If you are looking for a small form factor PC, then check out the Ripple Look PC.

The Ripple Look PC measures 215mm x 235mm x 69mm, and it comes with a choice of Intel Atom processors, including the N230, N270 and N330.

Ripple Look PC

Ripple Look PC

On top of that you can have up to 2GB of RAM and the choice of either a 160GB or 320GB hard drive, it can also be attached to the back of your monitor to save some desk space.

Unfortunately it looks like the Ripple Look PC is only available in Korea at the moment, there is no word on pricing.

Product Page, via Technabob, Slippery Brick