I just found out that Plugable's design intern made a 3d printed stand option for the USB microscope. He wrote a post about the project with links to the files on Thingiverse. Bob Boerner of of Plugable told me, "The short version is we wanted an option with something more stable than the goose-neck in the box that looks like the microscope stands of old. Since I saw that you were having fun with your Printrbot I thought you might want to give this a shot."
I'm looking forward to making it!