IMusic(download full mp3s straight from your phone)
Meridian(better media player app, with gesture support)
Shopsavvy(barcode reader, better for comparing consumer products)
Lookout(antivirus, data backup, and phone locater via gps)
Download crutch(alows the browser to download any type of file)
Ebaypcktauction(full featured ebay app, complete with barcode scanner)
Bluetooth file transfer( easy to use bluetooth interface)
Opentable(find good restaurants near you)
Yellowbook
Checkbook(free) (checking acct management app)
Pdanet(allows easy tethering)
Ringdroid(easily create ringtones from your phone)
Games
Papimissle
Jewels(bewjewled clone)
Mystique(cool 3d resident evil type game)
Papijump
Space war
Light racer