The Custom Sidebars Pro plugin is great. I'm struggling with a use case that perhaps isn't as you intended, but I'll throw it out there and see what you think.
My site is primarily based on pages. I have several user types that allows for the editing of pages, but not creation. I also have the typical subscriber role for posting comments, and such.
The problem I am facing is that I don't seem to be able to control WHO is able to change/select a new sidebar to appear in pages/posts. It appears that all users have the right to assign a new sidebar, regardless of their WordPress rights.
Am I missing something?