Yeah I picked up a 1 gig DDR2 667 Crucial from Newegg because it was the cheapest (like $17 with free shipping). Just ordered a 4th gen Mo-Co-So case. They said that they'll be in stock in 7-10 days. I've got a Seagate 120 gig 2.5 and M2-ATX from my last CarPC build. So far I've only checked the board to make sure it POSTs.
One issue is that the M2-ATX includes a 20 pin power plug and the board requires a 24 pin. I'm going to have to splice a 24 pin plug on there, and also create a P4 to P4 wire.