The desktop!
Transmission bit torrent client
Firefox - this will be swapped for Firefox 3 come the release
File operations all go into a single windows - a nice touch
Authorizations panel
I like Ubuntu's System Monitor
The world clock/weather applet
That "Unlock" button can save users a lot of hassles
Brasero disc burning software
Remote Desktop preferences - General
Remote Desktop preferences - Advanced
Vinagre VNC client