Mark, if you want to learn SketchUp I can help. The images I started this thread with and many other drawings I've posted here on the forum are just SketchUp models with various display styles applied. you can do that, too.
As to tutorials for SketchUp, I would be happy to give you a "live" demo to get you started. Luca (brandy20) has a site where he is also offering some tutorials. Look at his posts here on the forum as well. And there's always Design. Click. Build. on FineWoodworking.com.
If you want a "live", personal demo, drop me a PM and we'll make arrangements.