Remote xbee based relay trigger

[saurabh9 <saurabh9@xxxxxxxxx>]

I need that when a device A(using maybe a MAKE controller) sends a
wireless command,  an xbee device B should be able to turn on/off a
light bulb on wall, preferebly via a digital dimmer. Here, the light
bulbs etc. run at 220V AC.

Can anybody suggest me a budget conscious way and and safe circuit
idea to make this device B? One way could have been to mount device B
on another MAKE controller, but that will be too expensive and perhaps
bulky to have MAKE controllers littered wherever I need a light bulb
controlled. I think I would need a relay on device B, but ma not sure
how to trigeer it remotely via the xbee.