Attached Link: http://wiki.blender.org/index.php/Doc:Manual/Modelling/Meshes/Subdivision_Surfaces

I don't think Sketchup does subdivision, but Blender does, and the Blender forum here is a good point to start asking for advice on how to do it. I still haven't started on my "Blender for Dummies" book, so don't ask me. :) Here's a link to the Blender wiki on subdivision.