I upgraded from 6.1 to 7.04 (feisty fawn) last night. Everything went well but kinda slow. I started at 1230 am and didn't finish until 3:45 am. Compared to the initial install of 6.1 this seamed like a long time, but it was mostly flawless. I got a couple of pop-up messages telling me that a few pieces of software were no longer supported and Automatrix told me it was the wrong version now, but nothing I couldn't guess the answer to. I haven't noticed anything yet that is broken but I didn't see that much new either. This is my first Linux upgrade so I don't know what to expect. It said it had a fancier windows interface but when I turned it on it took away my minimize and maximize buttons.
After the three hour upgrade I was too tired to test it much, but I'll get into it soon and write about it here. I have NOT upgraded the laptop yet because one of my friends has been fighting 7.04's wireless support. I am using the laptop and don't consider it a test bed anymore so as soon as I put feisty fawn through it's paces on the test computer, I'll try it on the laptop.
p.s. I'm still working on the Pocket PC stuff