Intel's 'AppUp' app store is giving away 15000 copies of Angry Birds (full game not a demo).
Download the app (22MB), register and you can get the game for free from 1st Feb - 31st March or until all 15000 copies are gone whichever is sooner
NOTE : Windows Vista is not supported
Normal price is £3.49
story here :http://www.electricpig.co.uk/2011/01/31/get-angry-birds-pc-for-free/