i use a linksys card with their AP router. works pretty decent, but not great. the signal strength seems lame considering im only like 10-15 feet from it usually, and like every 2 months or so it hoses out completely and needs to be rebooted. sometimes my laptop wont find the ap at first until i bring it like 2" from it also. it also takes me like 20+ tries to connect with pppoe sometimes. i would probably reccomend the card, just not the AP.
http://www.orinocowireless.com/ is high quality.