The home network is getting to the point where I'll have to look at something less ad hoc soon. Right now, there's a wired/wireless router in the basement (which is where the cable service comes in). We have 4 wires dropped to that, and everything else is on Wireless. That would be fine, except that the WiFi seems limited (and shaky) in the family room - which is where the big TV that now has HD is.
So... Down to Staples, where I bought a new router that supports wider range and pre-N - which will be useful if we decide to put a Replay or similar device upstairs. That wasn't the end of the problem - my wife's old machine and new machine were off the network - there's a hub connecting those two (until the old machine migrates off upstairs). So... back to the store, where I found a 4 port switch for $25. That solved that problem. Now, I just have to wait for a free few minutes to swap in the new router.
The joys of the networked home :)