I assume you can do this with other phones too, though I've never tried it. The video call quality you get over 3G is fairly poor too - iPhone's implementation

I assume you can do this with other phones too, though I've never tried it. The video call quality you get over 3G is fairly poor too - iPhone's implementation seems to have much better quality based on the promo videos. However, it still has some major flaws - only to other iPhones (for the moment) and only when you're on Wifi - that requires quite a bit of coordination to make sure the person on the other end is ready for your call. I honestly don't see this catching on - the trend I see is away from actual human interaction (SMS, Facebook updates and IM) rather than towards it.