Comment Atmel == bad, D-link == ok, linksys == bad (Score 1) 650
I've had my d-link dwl-120 which uses the atmel at76c503a chipset.
Not only are there no linux drivers(the project on sourceforge is just for uploading the firmware) but atmel refuses to release the specs. Buyers beware.
The same applies the linksys WUSB11 (not version 1.5)
D-link, on the other hand, has been very helpful, and the tech support actually humoured me. However no refund was possible.
Linksys, gave me the "linux isnt supported, blah blah" speech.
In summary, linksys and atmel are evil, and d-link is ok.