I don't know of a PCI card that will work and supports hostap mode. Read the manpage of "run" for a list of compatible cards. I'm not sure if they will currently work in 802.11n mode either, but the card supports it at least. These are all USB:
Airlink101 AWLL6090
ASUS USB-N11
ASUS USB-N13
ASUS WL-160N
Belkin F5D8051 ver 3000
Belkin F5D8053
Belkin F5D8055
Belkin F6D4050 ver 1
Buffalo WLI-UC-AG300N
Buffalo WLI-UC-G300N
Buffalo WLI-UC-GN
Corega CG-WLUSB2GNL
Corega CG-WLUSB2GNR
Corega CG-WLUSB300AGN
Corega CG-WLUSB300GNM
D-Link DWA-130 rev B1
D-Link DWA-140
DrayTek Vigor N61
Edimax EW-7711UAn
Edimax EW-7711UTn
Edimax EW-7717Un
Edimax EW-7718Un
Gigabyte GN-WB30N
Gigabyte GN-WB31N
Gigabyte GN-WB32L
Hawking HWDN1
Hawking HWUN1
Hawking HWUN2
Hercules HWNU-300
Linksys WUSB54GC v3
Linksys WUSB600N
Mvix Nubbin MS-811N
Planex GW-USMicroN
Planex GW-US300MiniS
Sitecom WL-182
Sitecom WL-188
Sitecom WL-301
Sitecom WL-302
Sitecom WL-315
SMC SMCWUSBS-N2
Sweex LW303
Sweex LW313
Unex DNUR-81
Unex DNUR-82
ZyXEL NWD210N
ZyXEL NWD270N
If you have a mini-PCIe to PCI-E adapter card you can probably also use cards supported by the iwn driver (see manpage for list). These are laptop cards, so you will need to find a suitable adapter.
