I would say definately go for fixed wiring and put in as many cat5 or cat6 as you pretty much can stuff in the walls. You can get adaptors, baluns and converters for almost anything concievable in a modern house that can run on cat5.
use any of them. The available bandwidth does not warrent that everybody starts using wireless and the more people that uses this the worse it gets.
I did, which confirms my warning above. It uses 54Mbps wireless so is even worse on bandwidth requirements.
It may still be a good device, provided you disable it's wireless capabilities and use cat5 and put it in a 100Mbps switches network, I think that i'll do that if I was in your situation :-)
/Morten