According to the picture taken at Intel's IDF Spring 2008 event by our colleagues from Tbreak.com site, Zotac is one of the partners that will be doing motherboards for Intel's upcoming Atom.

Zotac has made a completely passive cooled motherboard which has two memory slots and one PCI slot. Both Atom desktop CPU and chipset will be passively cooled.

The picture also includes three more motherboards that are made for Intel's Atom processor but it is unfortunately you cannot tell who the other three are.

You can find the picture here.

Update: We just identified that the read board is MSI and you can check it here.