HP RP5700 SFF PC works with ESXi 4.1 plug and play
Worked perfectly, plug and play easy. ESXi 4.1.0, 348481
single socket Intel Core2 Duo CPU E6400 2.13GHZ/2M/1066 LGA775 SL9S9
8GB RAM (4 x 2GB)
using built-in NIC
2 SATA hard drives
Very stable, running 5 guests. Love this system, cheap ($250 on ebay) and has very low power draw and noise. Perfect for the home office.