Or is it? Via has released a Pico-ITX kit called the ARTiGO A1000. This thing is TINY at only 5.9” x 4.3” x 1.8”, but it still packs a fairly reasonable amount of power: “Powered by the 1GHz VIA C7 processor and supporting up to 1GB of DDR2 533 SO-DIMM system memory, the VIA EPIA PX mainboard is based on the single-chip VIA VX700 system media processor, boasting the VIA UniChrome Pro II IGP 3D/2D graphics core, MPEG-2/-4 and WMV9 hardware decoding acceleration and display flexibility. The onboard VIA VT1708A HD audio codec also contributes a rich entertainment experience.”
VIA has left room for later models as the A1000's network controller is limited to 10/100 Mb/sec and of course a faster CPU would be another possible upgrade for future models. VIA claims the entire A1000 uses 15 watts when idle and up to 20 watts when it's under maximum load, and that's quite impressive. If you're looking for something relatively small, and you plan on doing very light-weight computing, then this could certainly be worth looking at.