xtract, I was looking for the same thing this week. I designed a table in SW for a customer, then wanted to drop it into a Sketchup model to play with the layout where the table was going. I couldn't find a way to do this. Earlier versions of Sketchup let you bring in a dxf file to build from, but that ended at least with version 8, except for Sketchup Pro. There may be a way to do this using Blender to convert between file types, but I haven't played there for a while.
Good luck. Diego