We've had some experience this year at Fat Pencil Studio using SketchUp with VISSIM. Here's a couple blog posts describing the results:

http://fatpencilstudio.com/traffic-simulation/
http://fatpencilstudio.com/pedestrian-simulation/

A few things we learned in the process:

1. Save files as "SketchUp 6.0" format before attempting to import into VISSIM. The SketchUp file comes in as a static "background", and you can define movement paths right on top.
2. Some materials that look fine in SketchUp were problematic in VISSIM, either because of a color shift, or texture rotation. We used a trial & error process to fix these.
3. For parked cars, SketchUp components work fine. For moving cars, we used VISSIM stock components.
4. For the light rail vehicle, we had to use VISSIM's 3d model editor to import a SketchUp file and then make it available as a simulation component.

Joshua Cohen
Fat Pencil Studio
503.465.4533

I tried to use CameraKeyMaker on a Mac running Sketchup 8, but ran in to the same problem others have mentioned: I cannot seem to find an equivilant key combination to Alt-Q used on Windows, and so I can't place any camera keys. (neither Opt-Q or Ctrl-Q work for me)

If there's a simple fix for this I'd love to hear about it, otherwise I'll eagerly wait for the next version. This seems like a great tool that we could use on many projects.

Best Regards,

Joshua Cohen
Fat Pencil Studio
+1.503.465.4533
info@fatpencilstudio.com