What's smaller than a small form factor PC? Frankly, a lot. Cells, shrimp, quarters -- you name it. That said, there aren't many bona fide PCs out there that can shrink down beyond the admittedly vague SSF dimensions, but Dell's making another push for its Ultra Small Form Factor (USFF) as the "world's smallest fully functional commercial desktop PC with an integrated power supply and Intel vPro technology." Of course, there's quite a bit of qualification going on there (and rightfully so, given just how tiny the fit-PC2i is), but those interested in taking the plunge can order one with an Intel Core 2 Duo CPU, Windows 7 and a host of other run-of-the-mill amenities starting at $629.