Took me some time, but I finally found & bought a powerfriendly board I like:
http://www.supermicro.com/products/nfo/atom.cfm
Good brand, server-oriented, PCIe, two NICS.
Main downside is the maximum of 2GB memory and lack of ECC/buffering (If you're into that ...).
I got the 5015A-H yesterday, pretty sweet. FreeBSD works great with the NIC and Intel RAID -- Guess there's atleast one advantage of intel using old chipsets for the Atom
I payed 230 euro for it (Just for the barebone, also needs a HDD bracket, memory, and a hard disk).
The 1U case is so small it's been a source of some jokes at work btw...