Here's a little project I've made October 2009:

I've bought some cheap wireless controllable power outlets. My plan was to be able to control them somehow with my computer. I've first tried to hook up into the remote control with a Sunspot, but I had to realize that it was to slow to produce the needed datagrams (a complete datagram takes about 4ms) So I've taken a Attiny45 microcontroller, which does the job quite nice :) The little attiny board and a board with a voltage regulator is then linked to a WRT54G (I love them!)

After assembling the stuff back together, it only needed some shell scripts to communicate with the sending unit (it's a 1-wire serial connection, a lazy 0=short pulse 1=long pulse protocol) Now I can control those power outlets from everywhere with my iPhone... yay!

Thanks for the information at Mikrocontroller.net. It was a good source for my implementation :)