2/5/2009 - Marten van der Honing sent me another .obj exporter that supports textures. See this post for download.
While the Pro version of SketchUp comes with the ability to export OBJ files, the free version does not.
This plugin was my attempt to write an OBJ exporter using SketchUp's Ruby API. My motivation was selfish curiosity more than anything, so when the plugin reached a state where it was able to export simple models, I lost interest.
There must have been a need for this exporter because some sites started linking here, and the plugin has now become one of my most downloaded - in spite of it's lack of features and abundance of flaws.
In it's current version, this exporter may or may not meet your needs:
- Exports entire model.
- Exports top-level Groups and Instances only (not nested entities).
- Has trouble with complex Faces.
Finally, I want to thank everyone who has already helped me and given feedback - I can use all the help I can get.