Someone was asking about the permormance of these cards, just thought I'd throw in my experience.
I set up a wireless network in my fraternity house (2 main floors and a basement, 20 rooms) to share a dsl line, and I decided to go with the d-link products because of their price at the time. We use the dwl-120 (usb), dwl-500's and the dwl-650's. Great products. With one AP/Router (di-713p) on the top floor, the lowest signal strength in the house is arond 65%, even get a signal in the basement. And this is through many walls with all sorts of interference (each room has cordless phones, microwaves......). Very impressed, and have yet to have a single problem.
Throughput is about 4-5mb, with no wep enabled(have mac address security on router).
We bought these cards at $150+, this is a steal!!!!
This is my first post, so I just want to thank all the Anands for the great deals!!