I apologise in advance if someone has already posted this, but I've heard a few rumblings in the community about the Posibility that iOS 5 may include native FaceTime video calls over 3G as well as WiFi. Nice if it happens, but in the mean time I think my 7 year old son may have discovered a way to do it now without a Jailbreak or any other mods. Now today a mate and I took our kids fishing and we brought the iPad with us so I could sit down and read the newspaper "App" whilst we were there. I had the Personal Hotspot turned on the iPhone, sharing the 3G connection for a little iPad browsing, when my son started playing a game on it. The next thing I hear is my wife's voice and I can see is my her face on the iPad, and my son is having a conversation with her via FaceTime!! I thought it was WiFi only, so I haven't ever tried it before this, but I'm glad to confirm that it really does work. I can also confirm that it works on an iPod Touch and an iPhone as well, sharing a second iPhone's 3G data via Personal Hotspot. I guess it tricks the device into thinking it has a WiFi internet connection as the tether is via WiFi. As far as I can tell, this only works via Hotspot with a WiFi tether but not with a Bluetooth tether.