In celebration of the 40th anniversary of Atari and the venerable Pong, Atari has announced that it will be holding a contest calling on independent developers to re-imagine the classic game for the iOS platform. The Pong Indie Developer Challenge will provide entrants with the opportunity to win up to $100,000, and finalists will have their creations launched on the App Store under the Atari brand. Winning entries will also receive a long-term publishing…