Thought people might be interested in this little puppy: http://beagleboard.org/bone
For people too lazy to click the link, it is a small board powered by a ARM Cortex A8 (720MHz peak) and 256MB RAM. It comes with Angstrom Linux preloaded on a microSD card.
Alternately, you can get a cheap 5V power supply, connect it via ethernet to your router, and you can ssh into it (ssh is enabled by default, no configuration necessary). This is what I have done.
For the hardware hacker types, it also comes with a lot of connectors with some daughter boards and accessories in development.
For others (like me), it is an easy and fun way to play with an ARM board.
It does have a free USB port, not sure if you can say connect a hard drive to it.