AirPrint is here for iPod Touch. I can't wait to try it!
Apple made available an update for iPod Touch today.Among the new features, AirPrint.
Before you do anything else (especially if you're like me, and you don't sync regularly), connect your device to your computer and Sync ..... then you can update your software without losing anything you may have added to your iPod Touch that has not been previously backed up on your computer.
See Apple Insider