Well, I've been holding off moving to FC2. I've read all the horror stories and thought maybe I should just stay at FC1 forever!
Well, curiosity got the better of me. I backed up a test box and did the deed yesterday. I have a Nvidia card in this box so I knew there would be trouble but went ahead away.
I had a few problems getting everything working but this was much easier than setting everything up from a fresh install. My xmms played mp3 right off (all this was working in FC1). Pine complained about my self signed certs being missing but that happens everytime I upgrade openssl and I know how to fix that. I pulled down an 8k stack kernel binary/source rpm that Linuxant was kind enough supply. Using the Nvidia run binary against that and a couple of minor edits to XF86Conf and I was operational.
Oh, I forgot about having to remove cyrus-imap and installing dovecot instead. My yum.conf wasn't correct for FC2 but that was also easily fixed. I'm convinced that Google has all the information ever know to mankind!
So for those hanging back...I suggest a good backup and away you go!