Just how small can a desktop PC get? In the case of Shuttle mini x100, it's just 2 inches tall. While the company's recommended business configuration contains just an Intel Celeron processor, the home version gives you a choice of either a 1.6GHz or a 1.83GHz Intel Core Duo processor.
You can load it up with 2GB of RAM and a 400GB SATA drive, and it includes a 4-in-1 card reader and ATI x1400 graphics with DVI out. Configured to the hilt, it's 1452.00, or $1825. You gotta love the way you can stand up this PC up on end like a book—it's about the size of a dictionary, so it would probably fit just right into a bookcase.