We have a Solution Recipe that details this a little bit further, it was designed around UE 3 but the ideas are the same.
UE overview
01_overview.swf
Sending the form
02_sending.swf
This info is on the Universal Email support page in the section titled 'archived documentation' on the left. There is no coding that is needed to get the form info into an email message, you just need to drag the bindings for the info onto the page.