What, something like a mesh network? It would work if you are running a Radius software, but really all you need is one AP, unless you have a dead zone somewhere, then you can always place another unit at that point.
I would pull Cat-5e or Cat-6 to all rooms, at least two pulls per room, and run them all back to a central point. Same with RG-6. You can then as needed, place a 5 port switch where you may need more connections, or place a Repeater or AP at that deadzone.
If you have a basement, run the runs to each point that you can bring it up the wall to where the plate will be, or if a attic if home is on a slab, run up into the attic, then across to each point that you want the wires to go down for the plates.
I can reach my AP from a 50 foot radius, with it sitting four feet below grade. It is running at 400mW in b/G mode. As long as you run in mixed mode, the device will attempt to connect from best to worst. That means if it cannot connect at N, it will try G, if not able at G, it will connect to the slowest of course, which would be B. B is usually used for long haul type networks, where you are not so concerned with how fast that the data gets there, it just needs to get there.
As for my network, I use a 8 port Netgear GS-108 gig switch for everything but the three Uverse settops, which are directly connected to the RG for my ATT Uverse service. I ran everything into a 24 port patch panel, and really only currently have 9 wired devices, everything else in our house is wireless. I have moved files from my netbook running Ubuntu Linux to my desktop that is wired, and have had no problems, while at the same time my son is watching something on Netflix, I am watching something else on Netflix or streaming through Amazon OnDemand, and my wife is watching something on the Uverse settop in our bedroom. Never a slowdown with all of that bandwidth going on through the network.
Now on the other hand, I have had first hand experience watching my office of 20 people cripple a T-1, with pushing huge pdf files through the network, which in turn comes back for us to breakdown to place on a document imaging server. It got to the point that it behaved as if we were connected to a 24baud modem. We probably on average push several Terabytes of data on a daily basis in my office through the network, and by the end of the week we have probably pushed at least 2 to 3 Petabytes through 100meg & 1gig connections, depending on which workstation, and currently do not have a problem, because they have fixed the issue.
I could imagine if that was the same on most of our home networks, you would be pulling your hair out trying to fix it with QOS, which is a godsend btw when it comes to prioritizing network traffic. Open Source projects like pfSense, m0n0wall and the such do better at QOS than your off the shelf consumer grade routers.