Busted your laptop screen or just have no use for that old notebook any more? Snapguides user Vaibhav has a neat DIY project to turn it into a slide-out PC for your TV, powered by XBMC .
Apart from the laptop, you'll need a sliding channel, a spike buster, a wireless keyboard, and a display cord. Before you start, make sure there's enough room behind the TV to slide your laptop in -- with most mounted TVs, this shouldn't be a problem.
The sliding track will be fitted on the wall behind the TV and one channel screwed on the laptop. Make all the necessary connections and you should be good to go. Check out the full guide for step-by-step pics.
One thing to note: detaching the screen from your laptop isn't that easy. Also, some laptops house the wireless adaptor in the monitor's part, so you will need to reattach that -- although I'd suggest just buying a USB Wi-Fi adaptor. There's a decent generic guide on eHow for removing laptop screens, but it's best to search forums for your own model first.
How To Use Your Old Laptop [SnapGuides]