So far, so good.
Some random thoughts:
Thanks to .Mac, I was able to restore my calendars, addresses and Safari bookmarks. I re-authorized iTunes and the iPod for both Audible and ITMS. I lost a couple of playlists but I can no music.
My e-mail restored nicely from backups, as did my other home directory files.
Prefling doesn't work any more.
Xcode looks really cool, and I was able to open my old projects in it directly. The distributed builds feature is off by default and you have a choice of allowing your computer to be used for a build and/or using other computers for a build. Well, I have a class project to work on this weekend so I'll give it a good workout.
Looks great so far. The Aqua theme is toned down from Jaguar and the fonts are pretty easy on the eyes. Mail.app looks wonderful but GPGMail doesn't work in this version so it was automatically disabled.
The brushed metal Finder is going to take a little getting used to, but I've already found little changes here and there that are going to make my workflow smoother. Expose is awesome and I look forward to playing with it.
That's it for now.