Cooperative rendering for Yafaray -- Corefarm.org

"Corefarm is a place where you can either submit your Yafaray rendering job or participate to other users' rendering tasks. Corefarm splits your job in several small pieces and distributes them across the internet, leading to impressive rendering times."

Unfortunately, there is no direct exporter for SketchUp (can use Blender,) but there is no reason there couldn't be one. It might even make a good project for a Google Summer of Code project.

[ Link to Yafaray XML spec. ]