Shamelessly reblogging from Joe Healy over at DevFish: GOT XNA? WRITING AN WINDOWS PHONE GAME? WANT A SHOT AT THOUSANDS OF DOLLARS? Here’s the short version. Over 14? Write a cool Windows Phone Game and submit it to the Dream.Build.Play site. You could win up to $20,000. Yep, that’s it. In a nutshell. So on…