FWIW, I played around with some of the J. Brawley footage & my jaw hit the floor. In terms of grading, it doesn't take a lot of effort to get great results. All that dynamic range makes this a "killer app" IMO.
Not really looking forward to the workflow, however... and all that proxy conversion. It will be a pain in the ass. However, my primary work is Music Video, so for that application, the BMC makes sense. For live concerts, however, I'll be sticking with my pair of hacked GH2's.