Alright, here's how to get instantly streaming DVD quality OnDemand movies and television shows directly onto your Television. This is 10x better than Peekvid, AllUC and all of that riff raff. This right here is 90% of the way to the ultimate digital media box. Other improvements would be high-definition, and letting you do everything from your couch, but seeing as how we've made it this far, I think it'll be sooner rather than later that we make it all the way.
Without further ado.
You will need a modded Xbox with XBMC running.
Next follow these instructions to make sure your XBMC is running the webserver [instructions]
Now, the firefox extension listed at that link doesn't work on the latest firefox, but a working extension can be found [here]
Next, go to this site to find tons of movies and television shows listed [here]
Find the video you're looking for, then underneath the movie window where it says "download divx file" simply right click on that and say "send to XBMC". Voila! You now have a full screen movie playing on your television. It really has to be seen to be believed at how amazing this is.