MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
You beat me, kinda.
Your concept is very similar to something I'm working on. Isolating the plastruder platform from wobbles by the unstraightness of the threaded rod and using to precision rods to keep the travel as straight as possible. Here's a link to some pictures. :)
It's working great so far! Now I just have to make instructions and post it.