Joe asks, “What about wireless-n for Xbox 360. Will the routers work?”
There’s a bunch of 802.11n hardware on the market, even though the standard hasn’t been fully ratified as of this writing. It is faster than 802.11b and 802.11g, which makes it interesting for passing data around the house. There are currently no wireless adapters with 802.11n support for the Xbox 360, but 802.11n is backward compatible with 802.11g and 802.11b, so if you have an 802.11n router, you will be able to connect to Xbox Live using the newer and not fully ratified standard. One of the places I frequently play Xbox 360 games uses a 802.11n router and the gaming experience seems no different than playing over other wireless gear. I’m still of the opinion that if you can play wired you should, because there are gaming latency issues every once in awhile while playing over 802.11b or 802.11g, but if wireless is your only option, future proofing with 802.11n gear likely can’t hurt.
For more on Xbox 360 wireless networking, see my article on segmenting your network for optimized Xbox 360 wireless routing and Xbox 360 Wireless Adapter Alternatives