Good call. Ok so this is my controller:

public class findOpportunity {
    public final Opportunity o;
    public User u;
    ApexPages.Action saveAction = new ApexPages.Action('{!save}');
	
    public findOpportunity(){
    	o = [Select o.Id, o.Owner.Id, .... from Opportunity o Where o.id =: ApexPages.currentPage().getParameters().get('id') limit 1];
        u = [select Id, FirstName, LastName, Title, Phone, Fax, Email, MobilePhone from User where Id =: o.Owner.Id limit 1];
    }
    public Opportunity getO(){
    	return o;
    }
    public User getU(){
    	return u;
    }

    public void save(){
	try{
		update u;
	}catch(DmlException ex){
	ApexPages.addMessages(ex);
	}
    }
}

 And then the component for the page is roughly like this:

<apex:component controller="findOpportunity" access="global">
    <apex:form >
        <apex:pageBlock title="Opportunity Proposal" mode="edit">
            <apex:pageBlockButtons >
                <apex:commandButton action="{!save}" value="Generate Proposal"/>
            </apex:pageBlockButtons>
                <apex:outputLabel value="Draft " for="DraftProposal"/>
                <apex:inputCheckbox value="{!o.Draft__c}"<br/>
            <apex:pageBlockSection title="User" columns="2">
                <apex:inputField value="{!u.Title}" /></br>
                <apex:inputField value="{!u.FirstName }" />
                <apex:inputField value="{!u.LastName }" />
                <apex:inputField value="{!u.Phone}" />
                <apex:inputField value="{!u.MobilePhone}" />
                <apex:inputField value="{!u.Email }" />
                <apex:inputField value="{!u.Fax }" />
            </apex:pageBlockSection>
        </apex:pageBlock>
    </apex:form>
</apex:component>

So what I need to happen is when I update the fields in the user like name or email or whatever, it then needs to update in the object. Thanks in advance!