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