This project lets you switch your PC on and off with the TV remote. Several months ago I posted a project that showed how I use my DirecTV remote to control a lamp across the room. That project turned into something that I use all the time. Almost immediately after I started using it I realized that I needed something to switch my PC off for when I'm watching a movie playing out of the PC. I don't have a home theater PC or anything, but sometimes when I watch a movie late at night --which is quite often -- I would like to be able to hit a button on my remote to shutdown the PC.
Originally I was going to use the simerec.com SIS-PC chip for this but since they have an on/off module for PCs that doesn't require any soldering, I went ahead and got the PCS-1 module. If you want to save some money and have time to solder then you might consider the SIS-PC chip.