To do most of the controlling I used this tiny little web server control box called the WACI NX.

ENGADGET: How-To Hacks finalist: Controlling your home with your PSP

Unlike Sony who hides their protocols, the WACI NX has an open protocol which you can access from just about any web programming language.

ENGADGET: How-To Hacks finalist: Controlling your home with your PSP

In turn the WACI emits the IR signal to the TV through one of my IR Emitters, just as if I had pressed the button on the remote.

ENGADGET: How-To Hacks finalist: Controlling your home with your PSP

However, by using the WACI I have a dedicated piece of hardware that's only function is to send commands to my stuff no matter which interface I create to control it.

ENGADGET: How-To Hacks finalist: Controlling your home with your PSP

The WACI NX has a built in IR Learner so you can grab all of your remotes, learn all the button commands, and save them in the WACI to be played back and emitted later.

ENGADGET: How-To Hacks finalist: Controlling your home with your PSP

By using a controller device called the WACI NX you could turn on the TV, turn on the XBOX, switch to the correct input on the TV, and send the PLAY command to XBMC all in 1 button press on your PSP.

ENGADGET: How-To Hacks finalist: Controlling your home with your PSP

It's great because it has an HTTP and FTP server and uses regular HTML to issue the commands making it the perfect match for my PSP, which does not support any fancy Javascripts or DHTML. The PSP talks to the WACI NX via wifi through the network.

ENGADGET: How-To Hacks finalist: Controlling your home with your PSP