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.
This is a great resource I've been using a lot in calibrating my first RepRap. One thing that would help (with all the calibration objects on Thingiverse) is to have some set of instructions to go along with the object. Such as, "if the long bridge sags try reducing your flow," or, "if the top cube is messy try changing the infill rate for small areas." In my most recent test the bottom layers start out a little messy with a few little peaks and threads, but the print improves after a little while (.2mm layers with a .5mm nozzle and 3mm filament). It would be great to have some suggestions in hand to address that for this object.