'Late grats on the iPod Touch, th best peice of technology you'll ever get to poke. Theres countless apps you'll wanna try,(I jailbroke my iPod so I always try-before-buy apps) best site is definently
http://www.appvee.com/
I use it alot to decide on trying/buying an app.
Free games I recommend are;
Tap tap
Tap tap 2
TapDefence
PocketTanks
FS5 Hockey
GoogleMobile
Payed Apps:
Fieldrunners
iShoot
Ouch!
Leaf T-Bone
Bike or Die! 2
World of Tunes
Peggle
7 Cities
Fantastic Contraption
Enigmo
MyPaint2
Also if you haven't get casing.. My ipod is scratched to hell and I is sadded
(Getting 32g soon so its not so bad, but still) When a iPod screen is scratched it becomes a magnet to anything that will scratch it, I know this first hand, and second, also every scratch on a screen like the the one on the iPod Touch will end up looking like a mini rainbow glaring at you while you to ignore it.
Recommended cases:
http://www.switcheasy.com/products/P.../PureTouch.php
All positive reviews from everyone and if ya asked me, makes your iPod look even more sexy
Hope I helped.