[slightly further OT]
don't thank Google or Trimble for SketchUp. Both have done hardly anything with it since purchasing it from the few small developers who originally built it (I believe they were ex autodesk).
Wonder how much of the original team is still there? The original product was brilliant, and it's nice to see it survive multiple acquisitions.
for example. Looks like Schell sold Cadzooks and was absorbed into Autodesk. Not sure about Esch