SSHDroid and other likes like FTP are not the solution. We need a native filesystem mount.
You can use FUSE and write a script that mounts it but it is very wonky and sloppy.
I'm also very confused why they dumped USB Mass Storage for MPT.
I can't plug in my phone to my car's usb port anymore.
Furthermore, many of the music sync apps don't work even if you have MPT access like doubletwist:
Galaxy Nexus not recognized for Mac
My Windows7 computer can't see my Galaxy Nexus device