Is it possible to have - say in a large site - a way to incorporate different themes for different parts of a site?
If not, that is a feature request!!
I don't think it has to be so complex.
Choose a page or pages in your site. For each page, go to Page Info then Styles. The first line is a drop-down menu of all your installed themes called Page-Specific Theme. By default it shows your chosen theme, but you can select any theme on the list and it will apply to that page ONLY.
Thanks Vasily. Your idea has promise, but I'm not sure how navigation would work. How would people jump from one area to another without entering in a new URL?