I had a good search for this and could not find anything (maybe i'm just crap at searching).
I'm after a plugin that converts your most popular tags into categories.
Obviously most popular tags is already something that gets measured, for tag cloud font sizes.
I'd like to take a customizable percentage of the most popular tags and convert them into categories to be displayed in a list in sidebar. So maybe top 12 tags out of 30 for example, based on number of times tags are used.
Does anyone know of such a plugin?