In case someone else is looking for a solution, i have this (30 Euros):

http://uberhost.dyndns.org/dokuwiki/doku.php?id=steckdosenschaltleiste

You connect it via USB to any unix and either switch it on and off as you please or programm it. I use it to turn off my aquarium lamps at night and when the temperature reaches a certain value (using a cheap USB sensor) in the summer.

The SE could send the commands to programm it via telnet or so to that unix box.

I also used a bunch of them in a small datacenter, so you could powercycle everything remotely from a remote network management console. Quite nifty, if i may say so .