Yes, jailbreaking is a very successful software! Free apps, modifications, and etc.! Ya I think it is good! :)
Yes; not jailbreaking it. If you mean a way to do the same thing as jailbreaking without actually doing so, there is no current way to do so.
no it is not illegal. they have now confirmed that it is legal. but it can mess up your ipod for good.
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.
So that you can put third party sim cards in it.
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.
Yes
It is illegal.
no