Of course there's already the P-ROC (<a href="http://www.pinballcontrollers.com" rel="nofollow">http://www.pinballcontrollers.com</a>) which replaces the MPU in a pinball machine with a board running open-source software, and Ni-Wumpf (<a href="http://ni-wumpf.com/development.html" rel="nofollow">http://ni-wumpf.com/development.html</a>) has something similar for older machines, but this will be the first time that a pinball manufacturer has invited hobbyist programmers to modify the code.<p>I'll be interested to see how their plan to be "gatekeepers" of the mods works out, and suspect that if it takes off programmers will quickly find a way around it, if Jersey Jack's hasn't already decided to completely open it up by the time they launch.