Official Wireless adapter alternative?

Hi, my shiny new premium 360 came today and so far I'm very happy with it! The only problem I have is that my internet connection is a fair way from my room, i've had a long ethernet cable trailed across the house and down the stairs today, but its not very viable (or safe) for the long run. I've been looking into the official wireless adapter but it seems really pricey, is there a cheaper alternative? wikipedia suggested there was 3rd party alternatives, but i've not seen any?

so to recap.

is there an alternative to the official wireless adapter?

if so, where?

cheers.

the best way is ethernet or the wireless adapter

if you start using ethernet to a pc then to wireless it will just slow the process down i guess

a better alternative would be to use an ethernet cable to a wireless access point which connects directly to the wireless router, as the ethernet and access point are both dedicated to that job whereas at PC might not, also you may not have a PC near your 360 or a laptop!

I've got a MacBook and i gave that a go, but it didn't recognise it. but i'l look into that a bit further, thanks!Benno2000