We are in the process of evaluating every 802.11n client card we can get our hands on.
D-Link DWA-160 Xtreme N Duo D

D-Link DWA-130 Wireless N USB

Xtreme N Express Card Adapter DWA-652

Xtreme N Wireless Cardbus
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The 2 USB cards seem to be connecting an 802.11n speeds.
But I’m having problems with the DWA, I can only get 802.11g 54M.
Driver 6.0.3.107
Utility 1.30
Cisco WLAN 4400 controller
Version 5.0.148.0
I’ve tried the Windows XP wireless driver and the D-Link wireless connection manager.
Any ideas?