As someone who has dabbled with (and daydreamed quite alot about) home automation I must say, this is pretty cool! I have never had access to proper bluetooth equipment (don't have Arduino BT, haven't bothered learning using BT on computer) but I have used php+Visual Basic to make christmas lights and the like that can be controlled online. This allowed me to have a proper, graphical website as well as a very small text-only site for cellphone control pr GRPS. I also had homemade "aluminum foil and duct-tape" switches in some doors, which the host computer kept a log of. The log was of course viewable online, and came in very handy for prooving that my nosy little sister snuk into my old room while I was at work. 
My neighbour was pretty impressed when I told her to look at my old bedroom window, then pulled out my cellphone and started remoting the christsmas lights in the window.
However, there is one serious problem standing in the way of me automating my apartment. Wireing! While hooking a computer controlled relay up to 12V christmas lights is piece of cake, and adding proper relays to an outlet-splitter is very much a possiblility, how do I control the hard-wired stuff? I don't own the apartment I live in, and even if I did, pulling down walls to install wireing and electronics is at best impractical. Besides, one needs to be a certified electrician working for a certified company to do legal installations/modifications on a mains wireing system. =/
Anyways, very cool stuff! If you have any thought on how to get this into "real world", please share!