I can confirm S3200SH is fully compatible with ESXi 4.1
The problem I met previously is because of an unstable RAM module caused. After replacing the Bad RAM module, every things are OK. Both NICs are supported.
Beware don't to use VT-d when using Dell PERC 5/i.
My Configuration is:
M.B. S3210SHLC (Bios version: 0052)
RAM DDR2-800, non-ecc, 2G x 4
Raid Dell PERC 5/i (flash withLSI firmware)
HD WD 16000YS x 4 (raid 5)
Both onboard NICs are suppoted
I also, have another machine running ESXi 4.1 very well:
RAM DDR3-1333, 8G x 2, 4G x 2
HD Sata-2 320G + 160G
Only one NIC supported
So I add another PCI-e NIC, BMC57xx
Thanks for sharing!