Hi,
I too have Fellows stowaway USB keyboard, ordered through CompUSA.
This is compact when folded, but one downside is when it's in use, this keyboard requires fully flat relatively wide desk space because of its extra inches left and right. Also pretty expensive.
I also tried Logitech USB keyboard for Playstation2. This is good compact keyboard and also cheap ($19.99 at Fry's). So, if you don't need foldable type or don't want to spend $70 for keyboard, think about this option.