I've been looking high and low for a USB wifi adapter for my mac pro. I'm on my second airport extreme card and its just as useless as my first: constant dropped signals, not to mention them being weak. I have 2 laptops, one an acer aspire one netbook with wireless g, a macbook with wireless n, and two routers (linksys and dlink, however only one is used for obvious reasons). SO, now I'd like to get a USB Wifi adapter. I know Dlink makes a Raling DWL-122 rev. b1 wifi adapter thats compatible with macs, but its only wireless g, and its difficult to come buy these days. I've seen some of the Rokland USB wifi adapters but havent heard or read anything about them being any decent. Do you guys know of, or have had experience using other wifi adapters? I see a bunch for sale on ebay but theyre all no-name. Any tips or suggestions? How does the 'Airport Express' work? Wireless N would be perfect.