You can use a [http://www.google.com/search?hl=en&safe=off&client=firefox-a&hs=Kw9&rls=org.mozilla:en-US:official&ei=6yfuS6H3LMXflgenpsC0CA&sa=X&oi=spell&resnum=0&ct=result&cd=1&ved=0CCQQBSgA&q=wireless+gaming+adapters&spell=1|wireless gaming adapter] that connect via Ethernet cable instead of USB for the Xbox 360.
This should also work for any other game system that as a Ethernet port and the Wii if you use a Ethernet to USB adapter.