Somewhat off-topic, but I thought some people here would be interested in the Microsoft Windows 8 Developer Preview. It’s absolutely free and available from Microsoft, but expires on 3/11/2012 (from what I’ve read). Just beware that this is pre-beta, so expect bugs.
They say all Windows 7 programs/apps should work on Windows 8. The main purpose of the Developer Preview is so people can start programming “Metro-Style” apps.