Sorry if this is wrong thread but i got some good news : ( also sorry if its old news )
I dunno if any of you know this but there is an alternitive to buying a $99 wirless adapter for your xbox 360. All you have to do is ( if your pc is on wirless... (costs about 29.99 for pc wirless adapter) ) plug an ethernet cord from your 360 to your pc. Some computers will auto configure it to work. If it does not work you just gotta go to create a new network / connection ( forgot witch one it is ) and say connects through this computer to access internet. The whole proccess takes under 5 minutes, even computer noobs should be able to do this. VERY simple.