Matthew,
At the moment, the most cost effective method of generating MVC files is via Sony Vegas 11 (also 10e). I work mostly on OS X and export intermediate video files (left view and right view) in the Avid DNxHD codec for transfer to a Windows 7 computer. These files are then imported into Vegas and linked as a stereoscopic pair.
Once linked and dragged into the timeline, a 3D Blu-ray image can be created. The highest MVC bit-rate available is 25 Mbit/s and the resulting Blu-ray image is pretty basic. Put the disc into a Blu-ray player and it'll start playing the video, no menus. You can, in Vegas, add chapter points to help with navigation once in the movie, but that's about all I've found thus far.
Someone trained in Vegas may be able to talk a bit more about creating menus, but I think that Vegas doesn't handle that sort of mastering.
I've not tried it yet, but I don't believe that Vegas will export an h.264 MVC file.
Hope this helps.
--
Chris Eller
* Advanced Visualization Lab - Indiana University
*
http://ceeller.blogspot.com/