A few more:
Zedge - ringer/wallpaper app
LiveStrong - I'm tracking my diet/exercise on the LiveStrong.com site. This app syncs with the web. Additionally, it allows me to use the camera as a barcode scanner to enter food items that came with a barcode. For instance, I ate a SmartOne meal for lunch, scanned the barcode on the box, and it entered all of the dietary information for me (and then synced with the web app). It's not perfect, but it is incredibly cool and useful. Costs $3.
Evernote - I'm just starting to use this, but it's been popular on the web for a while
OrbLive - I have this on my IPod Touch and love it. It's now available in the Android market. It's still very new, so I'm giving it a few weeks to work out the kinks.
Also, for those with a Samsung Moment, Sprint has come out with a fix for GPS and Battery issues among other things. You have to take your phone to the store at this point (not OTA yet). You might call ahead of time, because some stores don't have a clue how to do it for some reason.
Edited by Smarge, 22 January 2010 - 05:17 PM.