This is what
www.teamxbox.com answered for a question on will any usb wireless adapter work...
I know the new Wi-Fi adapter for the Xbox 360 is USB based, but will we be able to use the current Xbox wireless network adapter with the new Xbox 360?
Yes, you’ll be able to use any Ethernet-based wireless bridge (aka wireless adapter) with the Xbox 360. Just plug it into the Xbox 360 Ethernet port and installation will be the same as with the Xbox or any other console. The reason why Microsoft made the new adapter USB-based is because they wanted to eliminate an external power source for this adapter; other than that, it is identical to other wireless bridges
So if this is true it will be sweet, we'll have to wait 5 days for the real answer though.
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