That would be great! Now, I know that I could run wires throughout my livingspace and just put relays, solid-state relays, etc. in place of the light switches. However, the madamme would proooobably not be a huge fan of not having working light switches. Eheh.. :
How did you wire things up? I mean, the only truly practical solution I can come up with is having 2 wire pairs running to every switch. One pair to control the action (ssr, thyristor, whatever) and one pair connected to an impuse button that tells the Arduino to toggle the light in question. I could of course go with this solution but I don't like doing something unless I have it perfectly mapped out in my head! 4 wires to every switch sounds like such overkill, and of course there is the whole issue with mounting the relay properly in place of the old switch as well as getting the new button in place without it looking like crap. (for my part, having a radio-shack type electronics button on the wall wouldn't be a big deal, but again, the misses prooobably wouldn't be crazy about anything that is too visible :P)