SuperMicro X7SPA-HF -6sata, 2nic, mini-itx esxi 4.0U1 works
ESXi 4.0 U1 Whitebox, stock
SuperMicro X7SPA-HF Mini-ITXhttp://www.supermicro.com/products/motherboard/ATOM/ICH9/X7SPA.cfm?typ=H&IPMI=Y
Dual onboard Intel 82574L gigabit nics
Intel Atom D510, Dual Core 1.66ghz with HT
Bios Revision: R 1.0b
Onboard NIC's detected with unmodified install.
Onboard 6 sata storage set to AHCI (ICH9/9R, fakeraid off)
IPMI works with esxi, temperature / fan speeds monitored.
No Intel VT-x (atom D510 doesn't support)
(note the fan alert . . . this is running fanless and still sitting below 50C)