eagleUP v4.2 was released. This is a new and popular program for exporting Eagle PCBs to use in Google Sketchup:
Version 4.2 has been released. It simplifies the configuration and detects wrong settings so that it’s much more reliable. It should be more stable on OS X platform as well.
Concerning the parts, there are a few tutorial on the blog explaining how to import and export in mechanical formats. Useful for connectors and other big parts.The warehouse is extending, slowly. You can always send in your own parts ;-)
Via the comments.