Carlos Camacho writes "iDevGames, a Macintosh Game Developer's Site has started issuing small programming challenges to Mac developers. The first challenge just wrapped up and the result is two nifty apps. The source code for both apps, and all apps entered into the programming challenges, will be released as open source. The next challenge has added an extra day, so developers have 72 hours. The focus is on creating an application to demonstrate 'A* pathfinding.'"