I agree! Great ideas here for lightning, volumetric clouds, and translucent objects being lit from within!

Brian-
If you want to upload a file to R'Osity, change it's extension to something R'Osity accepts. Like .txt, or .jpg. Just let people know you've changed the name, and tell them what name to change it back to and it works fine.  When HowieFarkes uploaded his file earlier, he actually posted a link to his own server where he didn't have the same constraints as the R'Osity servers have.

Hope this helps and thanx for the tips! :D