Been looking at getting xbox live but because i can't connect my xbox and pc together with a wire because they are too far from each other i was looking at the wireless network adaptors and the prices are a bit steep (£60+)

Was wondering if you have to use the official 360 wireless adaptor or if you could get a cheap one from some website?

Please post places i could get them for cheap from...(if possible)

Cheers, Joe