arduino - DSLR shutter release

Develop a program for an Arduino Mega 2560 to control the Shutter Release on 50 Canon DSLR cameras. Program needs to run from a Mac and have the following programmable controls. 1) Fire all cameras at once 2) Fire cameras in sequence with variable times between cameras (down to 1/100th of a second if possible) 3) Adjust the firing sequence of the cameras (ex. 1,2,3,4,.... / 50,49,48,...) 4) Set the sequence to repeat. Developer can use what ever UI framework they desire as long as it runs on OS 10.7. UI should allow for text or graphical inputs to controls. Website with details for a similar application using USB relays - [login to view URL] Website for Arduino - [login to view URL]