You know - I've never thought this would help - but just to throw it out there - I own a Mark 3 and I'd be happy to help in any way if I could? I've run the Alpha 2 for a while now (it's awesome), but if you guys need me to do something, I can try it out. As long as it's pretty risk-free?
Or is that the rub? That it's not risk-free? Either way. Someone let me know how I can help with my camera and I'll try my best.
Download and try out the nightly builds. Those are where all the new stuff is. No promises on stability, but a good number of people are using them on a day to day basis and this is the only way to help the development team find bugs and iron them out.
Look for the nightly builds board on the forum.