I bought the CN 10000 from newegg.com which is fanless, supports SATA and has lots of USB connectors :
Newegg.com - VIA EPIA-CN10000EG 1.0GHz VIA C7 nanoBGA2 Embedded Processor VIA CN700 Mini ITX Motherboard/CPU Set - Retail
Running it with Google Earth, CoPilot 10, Boingo, and voice recognition without too many problems. I am not planning to use it for music/video playback so no idea what the performance for that might be.
It's hard to tell from Via's product descriptions, but it seems like most boards are very similar to each other so I think if you find a good deal just go for it.