I have begun a new project that relates to multi-copters. I have designed a shield for the arduino Due that makes using one for a multi-copter project a bit more convenient (or really almost any robotic type of project). The PCB is currently out for fab and should be back in about a week. You can read more about it in my latest blog post.
I have many improvements and additions I intend to implement, but I wanted to get the first version on my bench to work out any bugs before getting too far.
Let me know if you have any questions or suggestions.