Here's the video of my rover being controlled by the keyboard... something you can see in the video that I didn't mention in my post is that I mounted my wireless camera on a motor, and can pan it up and down using the Page Up and Page Down keys - this lets me see more when using the camera to navigate.
One thing I noticed after making this robot is that controlling it from the keyboard feels like playing a very realistic video game. :P
P.S. Another thing I did with the keyboard function is make a NXT Messenger. I can type a message on my keyboard up in my room and someone can read it two floors down on my NXT display screen. :-)