Can be found here: http://lkml.iu.edu/hypermail/linux/kernel/1410.0/02700.html
Hopefully will get merged into the kernel soon. Over previous candidate this fixes some minor formatting issues and removes a serial number comparison check (read: only would have worked with my camera).
I also have traces from an MU300 and might merge those in soon. Shout out if you'd really love to see MU300 supported on Linux.