Some games:
Doodle Jump – good "sat on the bog" game
Flight Control – stop planes hitting each other.
Bejewelled 2 – the gem matching classic with new Facebook-linked Blitz mode.
Wild West Pinball
iBomber – man the bomb sight of a plane and blow stuff up
Word Ace – Boggle meets Poker
Broken Sword – remastered version of classic graphical adventure
PicGrid – picross style puzzles
Jet Car Stunts – remember "Stunt Car Racer" on Atari/Amiga, well it's like that.
Dr Awesome
Other Stuff
Now Playing – local cinema listings, film reviews, etc
TVGuide – TV listing that is probably faster and better than the one built into your TV
Stanza – electronic library
iOSMaps – os mapping (currently broken)
MotionX GPS Lite – more mapping, plus tracks, offline maps etc (free)
Photo Buddy – lots of handy calculators for photography (e.g. DoF, exposure etc)
NatWest – banking
Gorillacam – adds self-timer, digital zoom, spirit level etc to camera
Camera Genius – similar to Gorillacam but also adds burst mode and voice activated shutter
Photoshop Mobile – for tweaking pics once you take them
PixUp – for uploading pics to various websites (Facebook, Picasa, Flickr etc)
facebook – becasue you can't live without status updates
MPORA – for a YouTube like thing full of biking/snowboarding videos.