I am using a RevitLT / SketchUp workflow. I've tried all manner of programs and in the end settled on RevitLT. The documentation is what sells it for me - grids, schedules, tags for windows and doors, etc. That being said, nothing rivals SkecthUp for the 3D modeling of odd stuff and all the possibilities of presentation.
I model everything I can in RevitLT and export the file as an acis solid dwg. This imports into SketchUp without any problems with all the Revit objects becoming components or groups. What doesn't happen is the importing of the textures. I do the texture application in SketchUp. This isn't as onerous as it sounds.
I use Simlab for 3D pdfs from SketchUp and find it quite useful. I can't use the Revit plugin as LT doesn't support plugins so I can't comment on that.
Not a perfect workflow but pretty good.

KrisM

I took a look at getting Didiers's Layer Names to Materials ruby working.

I posted a new version in this thread:

http://forums.sketchucation.com/viewtopic.php?f=323&t=36715

Convert Layer Names to Materials.jpg

convert_materials_to_layer_names.rb

Thank you very much. I actually have found that plug-in, which I guess leads me to the real issue, of how the heck does Radiance work. As it says in the description of sutorad, the plugin won't help you use Radiance. The whole Radiance community seems hard to get into, and yet it seems like it is such a powerful tool. I want to be learn how to use Radiance, and I would love to use sketchup models with it.