So that you can put third party sim cards in it.
jailbreaking the ipod touch is legal. But if you use the tool that gives you all apps free it is illegal.
It is up to you. No matter what you have on your ipod will become messed up when Jailbreaking...
As of today (November 24th, 2010), jailbreaking an iPod Touch is not illegal. Is it 100% safe? No.
There's no way to use them without jailbreaking. And you shouldn't do it anyway because it's illegal and you'll get yourself in trouble.
Jailbreaking an iPod could either be a success or a failure (meaning your iPod could break). It's your decision, but a risky one.
I think that many people are finding the most jailbreaking software for their ipod.
Yes, jailbreaking does void the warranty.
you cant
no
Yes
It is illegal.
You cannot get all apps for free without jailbreaking an iPod Touch. It is not possible.