http://www.team-mediaportal.com/ "MediaPortal is an Open Source application ideal for turning your PC in a very advanced Multi-Media Center / HTPC. MediaPortal allows you to listen to your favorite music & radio, watch your video's and DVD's, view, schedule and record live TV and much more." It's more or less what you get with Windows MCE. I installed it the other day and have been messing around with it since. It's pretty wild.