During SoTR 2011 I presented on using XFA PDF forms (a.k.a. LiveCycle forms) with ColdFusion. Slides and materials are now available for download.
A after-conference addition is that Chandan Kumar from Adobe confirmed that the issue with overwritedata=”yes” in the cfpdf tag is resolved in ColdFusion so you don’t need to add it to all cfpdf populate operations anymore once the fix is released / installed.