Microsoft's giving away free Windows Phone 7 device and 12-month Zune Pass subscriptions.

All you have to do is head over to the "official" sweepstakes website and complete the registration form. Or you can enter through Twitter by following @windowsphone and tweeting the phrase "Zune on Windows Phone 7 Rocks My World! Official Rules".

You are limited to two entries per day (one via the website and one via Twitter) and you can't use multiple emails to increase your chances.

There are five Entry Periods with the first starting on October 27th, ending on November 2nd and the winning names drawn on November 3rd. One Grand Prize (the phone and Zune Pass), along with five First Place Prizes (one month Zune Pass) will be given away during each Entry Period.

Good luck and let us know if you're one of the lucky winners!