Dave let us know that the popular BlackBerry PlayBook game PaperPlane has passed a half million throws, and in celebration the game is free to download this week only. PaperPlane is an fun game for your PlayBook that challenges you to throw the paper plane as far as you can across various levels. It's super easy to play and will definitely have you addicted right from your first throw. Ever since the original release the competition has been fierce, and if you haven't had a chance to get in on the fun now you can. PaperPlane is free to download from BlackBerry App World all week long (until this Sunday) so head to the link below and get it now!