Mac OS X Leopard
10. Better Ruby on Rails support.
9. Finally compiled FreeImage just now.
8. Feels smoother / starts up faster.
7. Spotlight works now. (Too slow/wonky before)
6. Got to geek out with Paul installing it.
5. Multi account iChat.
4. New 3rd party apps coming out soon (Delicious Monster, TextMate 2)
3. Spaces.
2. New Terminal with tabs and more.
1. Consistent Polished UI (once dock is moved to the side).
Hmmmm.. the last chap looks like a younger version of a professor I used to know.