InfoPath and/or Sharepoint list integration with Agile

Has anyone integrated --or has ideas on how to integrate-- a forms tool like Infopath with Agile? 

We are interested in using the forms capability of Infopath but the workflow capabilities of Agile PLM. We miss forms capability in Agile (we use 9.3.1.1), and so have made some use of Microsoft Infopath. We save these (xml) documents in Sharepoint and present them as a list and perform some data analysis.  But we find Infopath workflow cumbersome (and Sharepoint workflow limiiting), and already have some required user lists and objects setup in Agile PLM.

We could simply save the infopath form as an (e.g., document) object attachment in Agile, but that would not allow us to (neatly) display form elements in a Sharepoint list. We don't like the idea of replicating data in Sharepoint/Infopath and Agile.