Yeah just use AppTapp to jailbreak the phone, then you can get rid of it and use iBrickr if you like.
This process is just like a regular restore, so whatever you have synched with iTunes will be there when you restore.
That was the only thing that really held me back from buying an iPhone. Unfortunately I wandered into an AT&T store and walked out with one after 5 minutes. It seems to be pretty tough so I would just enjoy having it.