Thanks Dan, I've used a few on YouTube to get the basics, have the woodworking addin and would like to get really proficient with the tool, I'll check out the intel you provided.I am in the process of learning and have started to watch these videos online. Joe is an excellent teacher and has made some very informative videos on using Google sketchup.
I have also purchased Robert's Lang videos on Sketchup for Woodworkers.
Shop Class CDs: SketchUp for Woodworkers - Lee Valley Tools
Robert has a good blog as well on the subject:
Sketchup Tutorials: How to use SketchUp for Woodworkers