I\'m running a 660 on a 5600 using a Cisco 1200 AP, and it works 100% perfectly, in all variations of SID etc. The only thing that does seem to be a little flaky is the WEP implementation, so I\'d say leave WEP out of it completely! As a result, I\'m using MAC access control on my AP.
I\'ve been playing around comparing the DLink to Cisco 340 & 350 series and, while I can\'t really check throughput, ability to associate/sensitivity seems pretty much the same. I reckon doseas is right and you need a public AP....
Possibly worth mentioning that, even with the card recognised you do need to tell it to connect, as well, on insertion.
Hamilton