I'm going to give all this a try---as I'm very interested in using the UDK to test urban design (and then run games occuring in these designed / augmented spaces).
Signed up on the Unreal community discussion board...and found this same topic discussed here:
http://www.katsbits.com/htm/tutorials/sketchup_converting_import_kmz_blender.htm

Ideally, I'd like to work out a good pipeline for using SU created content....at least to put down an initial layer of general buildings, streets, etc.
Having said that...I'm not married to using SU to create content. But, like Revit and Microstation, I know SU well and am just hoping ot reduce the amount of new programs that I would need to learn (or direct others in using them).

@al hart said:

@dennis_n said:

Question: Is anyone using RPC now (for Revit, 3DS, Photoshop, etc.)?

And, if so would you like to be able to use them directly in SketchUp (they would just work in SketchUp - no external renderer required).

Yes.
I use RPC objects (including people) with MicroStation and Revit.
RPC for Sketchup would be great.

This is great!
http://www.iesve.com/content/default.asp?page=s62&newsid=3533&back=home

I've met Don...great, great person and very committed to his company, their products, customer service, etc.
Cameron

Greetings,
Frist, let me introduce myself:
I am an architect practicing at a large international firm in Atlanta. I really love using SketchUp- but have wondered about using it to pursue green building solutions, energy and thermal simulations, etc.
I've trained with ECOTECT as well as IES-VE. The graphical interface and output of ECOTECT is great...see http://www.squ1.com

Last year I came across some discussions about a plugin for SketchUp being developed by the DOE's National Renewable Energy Laboratory (NREL)...you can see a presentation of this here:
http://www.energycodes.gov/news/ecodes2007/presentations/crackerbarrel/Ellis.pdf

I contacted them earlier this year about the status of the plugin...and asked if I could beta (or alpha) test it. I was sent a link to the download, but, due to project issues here at work, never got around to downloading it. I've since tried to refind the link, but to no avail. (If I do get this again, and you are interested, let me know).

Some people report that this plugin is taking much longer:
http://www.buildinggreen.com/live/index.cfm/2007/11/9/Building-Energy-Analysis-plugin-for-SketchUp

There is one plugin already out...it allow SketchUp to output files for Green Building Studio using gbXML:

http://www.simplyrenewable.com/quantity_surveyors_news_27.htm

see also:
http://greenspaceresearch.com/demeter.html

Just thought I'd share this with everyone.

Cameron