Tulip cards (mostly just the newer ones)
Most PCI based 3com
Intel 10/100 (the stock card on Intel boards)
Intel 1000 (the gig-e newer version of the above)
Realtek 8139 based gear
Via Rhine cards
SysKonnect gig-e cards
Sis900 series and its friends
PCI Lance (which covers vmware)
and a number of others, I only left out a few... so the odds are good.

No Wireless card or PCMCIA/cardbus support as of yet, that's a lot to fit in.