Folks,

I had to skill up recently on the use of digital signatures in InfoPath, and this webcast I found is pretty amazing.   I had no idea how rich the support in InfoPath for digital signatures was, and this webcast goes into *deep* detail.   I found myself dozing off after about 45 minutes, but that was because I had what I needed by then.   Still, it's a great resource.

http://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032259545&EventCategory=5&culture=en-us&CountryCode=US

The presenter is Mihaela Cristina Cris and she is a big brain at Microsoft on InfoPath.