Hi A.J. and welcome to the forum,
I think this is difficult. You can do it but it will take a lot of custom code to access the values. Why not just turn demotion on and use the values from the forum? Demotion allows for saving values back to the forms from SharePoint. There are a couple issues with demotion and I have heard it was disabled by a recent service pack. If you don't have that service pack, it's probably still there. In the future (this summer), the Forms Server will provide the same functionality.
Patrick Halstead [InfoPath MVP]
InfoPathDev
Patrick Halstead
Project Manager at Qdabra