I would check into the Home Automation hardware. Many systems have gone to TCP/IP based networking. This way you can access features from a "Webpage" much like you would type 192.168.1.1 for your router for example. You can keep it local (Wireless network) or set it up as a Web server for while your away. A Good system will allow for scheduling (Turn off Web server while your home) to limit hackers access as much as possible.
INSTEON is fast becoming dominant over X10 automation devices.
It uses a combination of RF and your homes electrical wires to transmit data which proves to be more reliable when elec. lines are "dirty" or RF doesn't reach.
INSTEON Web Device here...
http://www.smarthome.com/2412n.html- Allows mobile web-enabled devices to remotely control INSTEON compatible devices
- PC-free timers offer an On and Off time for every scene or device
- IP camera support allows for remote surveillance and camera control
- Customizable web interface makes controlling your home easy
A list of other devices such as switches, outlets, cameras, keypads, etc...
http://www.smarthome.com/_/INSTEON/_/23b/land.aspx
Then there is X10 which has been around since the 90's which means it has an Open souce protocol (Many makers of devices) which can be good or bad depending on how you look at it.
http://www.smarthome.com/_/Technolog...h/23X/nav.aspx
Software for internet control of x10
http://www.visoracle.com/download/fr...ript/cpss.html