XBOX on my wireless network?

[JiveTurkey]

Yes, in theory the wireless router should be plugged into the wired router. With your current setup you are taking bandwidth away from the wireless and anything connected to it. In general, you would want routers as close to the source and hubs as far from the source as possible.

I wouldn't worry too much about it since you probably only have a few computers using the network at once and it wouldn't make a huge difference.