Was out in Glasgow earlier hunting for the best 360 deal at around £170-200. Ended up just getting the Pro with WWE Smackdown 09. Anywhoo, while the salesguy was yapping about their 'GameCare' for consoles (which I ended up taking...im a clumsy idiot - will need it, lol) I spotted their WiFi adapters marked down from £59.99 to £34.99. I was at another Game store just up the steet and cant remember seeing these, so im not sure if this is store-wide, Glasgow, or even just the Buchannan Galleries store... But if you need one, and live in (or near) Glasgow, it's the best price i've seen them go for! Even eBay usually goes more.
PS. Didnt get one as already have a free one from MS for doing their Windows Mobile retail courses. Also note that in-store you can get it for £44.99 when you buy it with a 360, but at Buchannan they were marked £34.99 and not part of a 'WBW' deal.