Gigabyte GA-H55M-USB3 Realtek 8111E works
Just got my H55 based system working.
ESXi 4.0 U2 and 4.1
Intel i5 650 3.2GHz
16GB Hyper-X 1600MHz DDR3
Realtek 8111E onboard works (r8168.o - 93kb version)
Intel Quad Port PCI-Express Gigabit (e1000e) works
IDE & ACHI works.
USB works (not USB3 yet)
No VT-d on this board (not available in BIOS but VT works)
IDE doesn't work with a custom oem.tgz with a custom simple.map and pci.ids file. Must add the device ID 3b20 after 3a20 to both files.
Attached is the oem.tgz file that made all the above work (has proftpd, wget, rsync added and SSH enabled).