Ok I have searched EVERYWHERE and have yet to come up with any helpful info o this but all of a sudden itunes just stopped displaying my iPhone so that I may sync my music and such. It's really beginning to piss me off now seriously and it makes no fuckin sense why it's doing this. I aven't chenged or installed anything on my pc so I don't know where the problem lies.

I am on firmware 1.1.2 and used Ziphone to do everything to my phone and it was working fine after that, then one day, nothing. The funny thing is, itunes opens everytime I plug in the phone to my pc but yet it doesn't show up in there, WTF!!

HELP!!!!

Try to use another cable...

Update or restore to 1.1.3 or 1.1.4 version!

I had the same problem, try this:
Turn on the iPhone and go to Installer, refresh the sources and during the refresh connect to the usb,now iTunes will recognize your phone..it worked on mine, try and maybe you'll be lucky, bye!

Try another USB cable, another USB port, another pc, and if that doesn't work try putting it in restore mode. If restore mode doesnt work use DFU mode. If iTunes is the only program that cant see it then it isw probably a software issue. If your PC doesnt recognize it at all then it is most likely hardware. If DFU mode doesnt work take it to apple, and they wont be able to tell it has been hacked because it is in DFU mode, so they will most likely give you a new one as long as you have your warranty.