So far I've picked up the Monkey Ball, Calssa Chess, Google, Myspace, NY Times, Box Office, Remote, AOL Radio and Ebay.
So far, I've had the best time playing around with the AOL Radio and adding certain stations under my favorites. I plan on eventually picking up one of the budget apps and also buy Tetris or Ms. Pacman depending on how well those games are rated.
It's been fun so far, I would have more time to play around with more apps if I didn't have to work. But I can already see how I'm going to need more than 8gb of space to fit Music, Video and Applications on the phone.
Jott - speak what you want, and it converts to text and makes an easy list out of it. Will be using this for the grocery store I'm sure.
People - a phonebook lookup app... faster than going through the browser to whitepages.com
Pandora - awesome, awesome, awesome. So full of win. Most exciting thing about the new 2.0 release. Full of joy and joyness. I was going to go buy the new phone hardware, but with Pandora I can actually put less of my iTunes library on the phone, so the 4GB I have will go a lot further!
Facebook - not much different than their mobile web, but seems a little faster
Super Monkey Ball - still getting the hang of controlling it, but it's fun. Not bad for $10 I suppose.
eReader - haven't used it yet, but could be handy.
VoiceNotes - a voice recorder. will be helpful next time I have a song idea and need to remember it.
Other than those, I didn't spot anything I thought would be that helpful to me... but there are thousands of apps to come
I've got facebook (but wtf, you can't make wall posts?), aim (even though push isn't out yet, i still think the program is solid (better then beejive), enigmo, trism, YPMobile (yellowbook) and weatherbug