Yes, I think everybody by now agrees that Facetime is coming to the iPad, you don't have to be a genius to figure that out. My point is that the iPad is not a natural device to hold a video conferencing session with, it is simply too large and awkward. Plus you are very limited by WiFi as it will only work in hotspots and your home. Most of Apple's iPad sales are for the WiFi so it's going to be annoying trying to find a wifi connection. Also, you require the other person to have an iPad or an iPhone since Apple is such a closed infrastructure and most likely won't allow other video conferencing apps to use the camera for streaming. It is TERRIBLY limiting.
Yes it is definitely coming but it is a gimmick most could care less about.
I don't care much about facetime,but If I were to use it,it would usually be at home or a hotel,where coincidentally wifi is usually available.In fact,my ipad hasn't left home yet.So I don't think lack of 3G makes it as stupid as you.