It wasn't just me that had problems, so bite me.
I tried iTunes. You think I've been here this long and not tried that? The 3 would just reboot over and over again. I got an opinion on the problem from someone off board that said that it was a compatibility issue with something that was on my 3, and that I should have done a restore to a new iPhone before I tried breaking it. Didn't know if that would have helped, and I wasn't going to sacrifice my new 3gs to find out.
So, if jail breaking is for you, it makes you feel like a rebel, a 'bad guy', or fills a need for you, than do it. Don't slam people that tried it and had a bad result. You aren't helping anyone by doing that.
On the plus side, I have heard that it IS more stable (this one perhaps excluded?) and I *was* tempted to jail break my iPad mini, but that's as far as it got.
I wish it had worked in my case. If nothing else, just to see what it's all about. A friend of mine did his 3gs, and it worked well for him. Then he went back to iOS.