We made a quick video showing how to use our software to control your TV (or any other IR device for that matter) with an iPhone or iPod Touch.
Watch it on YouTube here: http://www.youtube.com/watch?v=M–lNXpamDQ

In the video, you can see a quick demo on how to use custom commands in guiDesigner to control any device over TCP or UDP. We are using a GlobalCache GC-100-12 in the video, but any device with an ethernet protocol can be controlled directly from your iPhone using our software.