That strongly suggests Apple may include a camera in the next version of the iPad. Some code that supports toggling a video call between full screen and a smaller screen area also hints at the probability of being able to video chat and do other tasks at the same time. It's not all that much to go on, but it does suggest that multi-tasking may be coming along down the road for the iPad, and perhaps the iPhone as well.
So why no camera in version one? It's anyone's guess, but maybe Apple decided to hold off on supporting video conferencing over 3G until either AT&T improved its network to better support the relatively high data bandwidth video calls require, or until it was able to reach an agreement with another cell carrier. Perhaps it wanted to come in as cheaply as possible and leave some room to grow in version two.