hello i just picked up my iphone and would like to jail break it so i can get the nice screens and some apps that i can't get in the app store. i was curious is there any "bad" thrid party apps that contain virius or back doors that leave your iphone open to intruders? i know people who use this phone and its like their life so i was just curious about it. should i worry about the third party apps that i am going to put on my iphone???