I think the problem here are <apexageBlockTable> & <apex:inputField>

As a test - with slight modification I can see the data in a selection box:

public class newScoreRuleController {

   Lead lead;
 // public List<ScoringRule__c> criteriaLine = New List<ScoringRule__c>();
 public List<ScoringRule__c> ScoringRule { get; private set;}
 //public List<ScoringRule__c> ScoringRule;
 
 
  public Lead getLead() {
   if(lead == null) lead = new Lead();
   return lead;
  }

  public String getFieldName() {
   String s = ApexPages.currentPage().getParameters().get('fld');
   return s;
  }
 
    public List<SelectOption> GetFieldsForObject(Map<String, Schema.SObjectField> objFields, string lblPrefix, string fldPrefix) {
        // Build a list of field names to use to iterate the Map of field object pointers
     Set <string> flds = new Set <String>();
        flds = objFields.keySet();

        // Add the keyset of field names to a list so that it can be sorted
        List<String> fldList = new List<String>();
        for (string f : flds) {
            fldList.add(f);
        }
        fldList.sort();
           
        List<SelectOption> options = new List<SelectOption>();
        for (string f : fldList) {
            string fldName = objFields.get(f).getDescribe().getName();
            string fldLabel = objFields.get(f).getDescribe().getLabel();
            string fldType = ('' + objFields.get(f).getDescribe().getType()).replace('Schema.DisplayType.', '') ;
            if (fldType <> 'REFERENCE' && fldType <> 'ID' && fldName <> 'IsDeleted' && fldName <> 'SystemModstamp') options.add(new selectOption(fldType + '/' + fldPrefix + fldName, lblPrefix + fldLabel ));
            if (fldName == 'OwnerID') {
                options.add(new selectOption('STRING/' + fldPrefix + 'Owner.Name', lblPrefix + 'Owner.Name'));
                options.add(new selectOption('STRING/' + fldPrefix + 'Owner.Alias', lblPrefix + 'Owner.Alias'));
                options.add(new selectOption('STRING/' + fldPrefix + 'Owner.Department', lblPrefix + 'Owner.Department'));
                options.add(new selectOption('STRING/' + fldPrefix + 'Owner.Division', lblPrefix + 'Owner.Division'));
            } else if (fldName == 'LastModifiedByID') {
                options.add(new selectOption('STRING/' + fldPrefix + 'LastModifiedBy.Name', lblPrefix + 'LastModifiedBy.Name'));
                options.add(new selectOption('STRING/' + fldPrefix + 'LastModifiedBy.Alias', lblPrefix + 'LastModifiedBy.Alias'));
            } else if (fldName == 'CreatedByID') {
                options.add(new selectOption('STRING/' + fldPrefix + 'CreatedBy.Name', lblPrefix + 'CreatedBy.Name'));
                options.add(new selectOption('STRING/' + fldPrefix + 'CreatedBy.Alias', lblPrefix + 'CreatedBy.Alias'));
            }
        }
       
        return options;    
    }

 
  public List<SelectOption> getLeadFields() {
   Map<String, Schema.SObjectField> leadFields = Schema.SObjectType.Lead.fields.getMap();
      newScoreRuleController critClass = new newScoreRuleController();  
     //searchCriteria critClass = new searchCriteria();     
            // Return SelectOption lists for the Contact and Account objects
            List<SelectOption> sel1 = critClass.GetFieldsForObject(leadFields, '', '');
      List<SelectOption> options = new List<SelectOption>();
            options.add(new selectOption('', '- select field -'));
            for (Selectoption selOpt : sel1) {
                options.add(selOpt);
            }
   return options;
  }
 
 //****
 public String ScoreRule

{

get;

set;

}



 
 //****
  
 
 public List<SelectOption> getScoreRules() {
                List<SelectOption> options = new List<SelectOption>();
                        options.add(new selectOption('eq', 'Equals'));
        options.add(new selectOption('ne', 'Not Equal'));
        options.add(new selectOption('gt', 'Greater Than'));
        options.add(new selectOption('ge', 'Greater or Equal To'));
        options.add(new selectOption('lt', 'Less Than'));
        options.add(new selectOption('le', 'Less or Equal To'));
        options.add(new selectOption('starts', 'Starts With'));
        options.add(new selectOption('contains', 'Contains'));
        options.add(new selectOption('notcontain', 'Does Not Contain'));
        options.add(new selectOption('in', 'Includes'));
        options.add(new selectOption('notin', 'Excludes'));
                return options;
        }
       
 public List<SelectOption> getScoreVal() {
                List<SelectOption> options = new List<SelectOption>();
                options.add(new SelectOption('A','A'));
                options.add(new SelectOption('B','B'));
                options.add(new SelectOption('C','C'));
                return options;
        }
       
 public List<SelectOption> getWeightList() {
                List<SelectOption> options = new List<SelectOption>();
                options.add(new SelectOption('0','0'));
                options.add(new SelectOption('1','1'));
                options.add(new SelectOption('2','2'));
                options.add(new SelectOption('3','3'));
                options.add(new SelectOption('4','4'));
                options.add(new SelectOption('5','5'));
                options.add(new SelectOption('6','6'));
                options.add(new SelectOption('7','7'));
                options.add(new SelectOption('8','8'));
                options.add(new SelectOption('9','9'));                   
                return options;
        }
 
  public PageReference step1() {
   return Page.scoreRuleStep1;
  }
 
  public PageReference step2() {
  // Save some stuff here
  // Pass it through URL to the next page 
   return Page.scoreRuleStep2;
  }
 
    public PageReference cancel() {
     PageReference leadsPage = new ApexPages.StandardController(lead).view();
     leadsPage.setRedirect(true);
     return leadsPage;
  }


  public PageReference save() {
   // Create an object and save the rule and field there
   // TODO: Save an object    
   scoringRule__c myScoringRule = new scoringRule__c();
   PageReference leadPage = new ApexPages.StandardController(lead).view();
   leadPage.setRedirect(true);
   return leadPage;
 }

}

-----------------------------------------------------------------------------------------------------------------

 <apex:page controller="newScoreRuleController" tabStyle="Lead">
  <script>
  function confirmCancel() {
      var isCancel = confirm("Are you sure you wish to cancel?");
      if (isCancel) return true;
 
     return false;
  }  
  function leadChosen() {
   var isChosen = alert("Annual Revenue Chosen");
   if (isChosen) return true;
   
   return false;
  }
  </script>
  <apex:sectionHeader title="Scoring Rule Wizard" subtitle="Step 2 of 2"/>
    <apex:form >
     <apex:pageBlock title="Choose a scoring rule" mode="edit">
        <apex:pageBlockButtons >
             <apex:commandButton action="/apex/scoreRuleStep1" value="Previous"/>
          <apex:commandButton action="{!save}" value="Save"/>
          <apex:commandButton action="{!cancel}" value="Cancel"
                              onclick="return confirmCancel()" immediate="true"/>
        </apex:pageBlockButtons>
         <apex:pageBlockSection title="Choose a scoring rule">
        <apex:pageBlockTable value="{!ScoringRule}" var="sr" id="theTable" rowClasses="odd,even"
                        styleClass="tableClass" rows="5">
           <apex:column >
                <apex:facet name="header">Field</apex:facet>
            <apex:facet name="footer"></apex:facet>
            <apex:outputText value="{!fieldName}"/>
        </apex:column>
            <apex:column width="25%">
            <apex:facet name="header">Rule 1</apex:facet>
             <apex:inputField value="{!sr.ScoringRule_Rule1__c}"/>
            </apex:column>
            <apex:column width="25%">
            <apex:facet name="header">Value 1</apex:facet>            

            <apex:inputField  value="{!sr.ScoringRule_Rule1__c}"/>
            
            </apex:column>
               <apex:column width="25%">
                 <apex:facet name="header">Rule 2</apex:facet>
            <apex:inputField value="{!sr.Rule2__c}"/>
            </apex:column>
            <apex:column width="25%">
              <apex:facet name="header">Value 2</apex:facet>
            <apex:inputField value="{!sr.Val2__c}"/>
            </apex:column>
    </apex:pageBlockTable>
    
        <!-- Within a pageBlockSection, inputFields always display with their
             corresponding output label. -->
      </apex:pageBlockSection>
         
          </apex:pageBlock>
        
          <apex:selectList size="1" id="dSource" value="{!ScoreRule}">

            <apex:selectOptions  value="{!ScoreRules}"/>
            </apex:selectList>
           </apex:form>
       </apex:page>

 --lvivanin