Back sometime in mid-2009 Skycraft in Orlando sold these neat little vacuum florescent displays for $4.50. They came with a small sheet of paper identifying the pin-outs and indicating that they operated over a RS-232 link and at 12 VDC. Not much more info than that. I thought I'd get one and make it useful.
Results:
Skycraft VFD Wiki
VfdDriver (C#, Visual Studio 2005 project)