Thanks for your answers.
draythomp:
No, I've never heard of anyone controlling zigbee home automation with an arduino. It may have been done, but I haven't ran across it yet. I have a number of X10 devices, and I hate all of them. They are very unreliable.
If you search around this forum though, there are several people that have controlled lights and appliances with various techniques using an Arduino and XBee or other radio device.
Do you have any pictures, videos or something with your x10 devices?
Checking the forum, I found this post Plan: Arduino based home automation system (newbie :) ) - #3 by BroHogan - Home Automation - Arduino Forum
This guys talks about using x10device. Is this the same idea you were talking about.
Also I found this pdf http://www.houstondad.com/arduino/program_your_home.pdf
They recommend to use x10 Device will that be good or it will be a disadvantage?[quote author=Jack Christensen link=topic=136968.msg1029627#msg1029627 date=1355275632]
XBee can be a solution with normal electric outlets?