I want to spend two weeks working with the new fan-less, VIA EPIA-P820 pico-ITX board - with full 64-bit support - and matching VIA Amos-3001 chassis to create a full HD home theatre in my car. Thankfully, I don't have a car.
But it's a perfect base for a custom home theatre in any case. The board has a 1.2GHz U2500 VIA Nano processor with 2GB of DDR2 system memory, a VIA VX855 Media System Processor—which can decode any 1080p codec you can throw at it - and a VIA Chrome9™ HCM 3D integrated graphics core with full DirectX 9.0 support.
The best thing is that this 10 x 7.2cm board fits perfectly in the aluminium VIA Amos-3001 chassis, alongside a I/O daughter board with HDMI, VGA, Gigabit LAN and two USB 2.0 ports. The whole packaged is capable of outputting DTS audio through S/PDIF, and connect to an additional four USB ports, IDE and Serial ATA.