Strangely enough I installed Android on my laptop recently. Well, when I say 'installed' I had a LiveCD which I booted off so it didn't go near the hard drive. It kind of worked, and kind of didn't. Mostly because the mouse doesn't quite do the right things. I'm guessing Android expects more complex gestures. Anyway, putting it on a laptop is a party trick rather than something useful. Though I could try actually reading the instructions I guess :-)
You can find it
here
As they suggest, I loaded it into VirtualBox rather than have to reboot my machine.