I'm still missing 16...I don't really know if I'm missing something here or if I'm reading the datasheet wrong... But I wanted to ask around here :]Really appreciate it and hopefully you'll be seeing my projects around this page soon!!!
No you are not missing anything. The Arduino team (in their wisdom?) elected not to wire up 16 I/O pins to any connectors. There is a 1280 mega board by Seeeduino that does run traces and connector pins for all the avalible I/O pins: http://www.seeedstudio.com/depot/seeeduino-mega-p-717.html?cPath=132_133Lefty