Do I need a computer to jailbreak my iPod?
Nope. If u have safari u can go onto jailbreakme.com and just slide to jailbreak!!
No just go to jailbreakme.com! Although if you don't want it to be jail broken any more you will have to sync it back to the time when it wasn't jail broken
It depends on what firmware you're running. If you're on 4.0.1 or below, the answer is correct. Above 4.0.1 and you will need a computer.
fissile is right