I'm a seasoned developer in SFDC but know very little about Eloqua.  I need to do an integration where an action in SFDC makes a call to Eloqua.  I've heard something about an SFDC / Eloqua interface but don't know if there is anything specific like that.  I know Eloqua has a Web Service API.  Found this on the web -- http://eloqua.blogspot.com/2009/08/getting-started-with-eloqua-web.html

Is the best pracitce for SFDC / Eloqua communiciation to import Eloquas WSDL to SFDC and write Apex code to call the Eloqua Web Services?

Any other ways to do it?