New SketchUp will not support AutoCad .dwg's?
This is just stupid, in my opinion. The newest release of the free version will not import / export as autocad files. The Pro version, which is what I use, will need an add-on for now, but even that won't work for long.
Here's the early-warning:
http://sketchupdate.blogspot.com/2009/08/coming-soon-in-google-sketchup.html