Learn FreeNAS

Nexxo has a great design for a FreeNAS box.

Called Ada (after Ada Lovelace), it is a NAS consisting of FreeNAS running on an Epia C7 mini-ITX platform, driving two 1Tb drives in a RAID 1 configuration. Simple, quiet, cheap, low in power consumption.

There is a nice 3D concept picture which is worth looking at here.