Apple plans to have a suprise on store when the iPad goes on sale this Saturday. There's a reason so few developers have advance iPads, and why even the few Apple employees that have them carry them in locked cases.
They have front-facing cameras and will enable live video chats where ever you can get a wi-fi signal.
And when the 3G version ships in a few weeks, we'll find that video chats are possible on AT&T's network as well.
The handful of critics that received iPads in advance will discover the video chat service at 9 am EDT Saturday, the same time Apple issues its press release in classic Steve Jobs "one more thing" style. The cameras are already in those critic's iPads, but the software includes code that disables them until magic time.
If you hadn't noticed, by the way, today is the first day of a new month, a particular day of note among those who like to fool people. This story is false. There is no camera. I hope I fooled you.

Very funny David. Now its not going to be as cool when I unveil it Saturday.