I too have the iLight solution - all round the house & it works a treat especialy with the Beo5 (I have put together some great macros - even one from the bedroom to put the light on in the bedroom, stairs & kitchen so it is not dark when I get up in the morning!)
Another great advantage of iLight is that you can actually buy the software for programming the system - it uses a simple intuituve approach and hours of fun can be had playing! (this compated with Lutron Homeworks which was the only other comparable system I could find - impossible to buy, and as for being able to get the software to program it - no chance!).
James
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