Use FaceTime Over 3G Without Jailbreak by a Simple Trick

Although Apple only allow the use of FaceTime over WiFi, the guys over CultofMac has just found a pretty cool trick which allow you to use Facetime over 3G without jailbreak.

It's a pretty simple trick, you have to install iOS 4.3 on you iPhone. The trick involves using the iPhone's Personal Hotspot feature to trick the device into thinking it is on WiFi.