I used 433MHz TC3 modules with an Arduino to send control signals to 20 different LED strips. Bitrates are low, but still pretty impressive what can be done with these things. And, a good choice since many RF based remote controllers use 433 so you can do rather a lot with this setup.
I did find that our paricular devices expected a preamble series of bits sent and commands needed to be sent multiple times. This wasn't documented :)