New member/1st post - here's my setup for audio:
1) Windows 2003 Server /w JRiver Mediacenter for multizone control
2) Delta 1010LT for multizone output ($150 CAD - on sale a few years back) - note 2003 Server driver's not officially supported (grabbed some older XP drivers, which work fine)
3) Sonic Impact T-Amp for each speaker pair/room (~25USD from Target) + 1 AMP power supplies ($2 each at a surplus store).
4) JBL Soundpoint in-ceiling speakers (~$80 USD per pair from online source - can't remember)
5) Logitech Harmony Remote ($60 CAD - on sale)
6) Cheap eBay battery RF transmitter/receiver (transmits any remote keypress to RF) - $15 + shipping.
7) Windows MediaCenter IR receiver (easy of integration)
I'm currently set for 4 zones on the main level of the house, and have pre-wired 4 more on the second level, 2 in the basement and one to the rear elevated deck (I wired the house myself during the build process). Price was really my biggest concern, followed very closely by WAF. At $105 USD for each zone (plus wiring), I felt I was doing it pretty well on the cheap. I did end up needing to run a 50 foot VGA cable to an LCD in the kitchen, where I display MediaCenter in TheatreView mode for use with the remote control - this was pure WAF. I had started by simply using a Dell Pocket PC & my cell phone (Windows Mobile) to control the system, but my wife was more comfortable with a remote. I find it's also much easier for other people to control the system during parties, etc, etc.
The biggest single (pleasant) surprise was the sonic impact T-Amps; the sound is incredibly loud for such a tiny device - I've never turned them up more then half way! (Typically, I've left them all set at half, and let the computer control the actual output volume - digital, so no residual hiss). If you peel away the casing, the actual chip in the T-amp is much smaller then a CF card and I was easily able to drive a bi-ampable speaker with my cell phone and the T-Amp using batteries! (Though you get a much better result with a power supply). I have the "array" of t-amps and power supplies sitting next to my server right now, and have 14 gauge wire running to each room, though you could technically also run the wires directly to each speaker and have the T-Amp sit next to the speaker (better/worse? who knows, but I hadn't run power to the speakers, and didn't want to tap anything after the fact).
Fun hobby!
GTC