Mike Tapa at MTFS Mounts & Adaptors (http://www.mtfservices.com), has just informed me that there will be a Nikon/Zeiss adapter for the Sony 3F, shipping by Jan 2011.

Sorry, but Jason Bodnar has posted this already. BTW I had some touch time with the F3 at Sony NJ, and was very impressed how the unit was constructed. All the 1/4 20's are directly mounted or part of the chassis. 2 on the handle/ 2 on the upper body and 3 on the bottom. 7 total.