I just paid $170 for a Cisco Aironet 802.11a/b/g Wireless PCI Adapter ( AIR-PI21AG-A-K9 ).
I was suprised to discover that it doesnt have drivers for windows 7 64bit. for the price of one of these it should be able to be supported on windows 7.
ive tried to run it on compatibility mode for vista and still nothing. this is very fustrating for an expensive product.