The X10 stuff seems pretty neat especially if you live in an apartment or dont feel like re-wiring your home right away. Since the latter can be extremely expensive and time consuming X10 def makes sense.
check this thing out
http://www.x10.com/activehomepro/activehome-pro.html
I know the site seems hokey but X10 has been around for a long time I remember a kid using it in his dorm room way back when I was a sophomore (like oh 7 years ago, wow, he was a Computer Engineering student of course) and it seemed pretty sweet, something about sitting at your computer and turning lights, fans, TVs, stereos on and off is just cool.
Here is all the portal to the automation section:
http://www.x10.com/automation/index.html