Firstly I think you should change the subject to give a sensible summary of your problem.Secondly, although I can't give you a link off hand, I've seen consumer remote control systems with a key fob style transmitter that operates a set of simple on-off switches at the receiver. This seems to be the sort of thing you're looking for and I think there is a good chance that there's a product available off the shelf that does what you want.Oh, by the way, XBee does not require an Arduino at the remote end.
but all the the receivers are on the same chip, rather than being physically seperate from one another.
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