This is a video showing how I use SketchUp to rig. Specifically the video shows how the rig works during posing.
This is a hack/cheat that I figured out for rigid body models. You can read more about it on my blog:
Yes. This is not a feature of SketchUp but a hack that I use to pose rigid body models. You can read more about how I make rigs here:
http://www.giantmonster.tv/giant/?p=110