Request – Sidebar by Categories & SubCategories

I would like start a generic wordpress blog.

Generic means no restrictions on the topics. It could be politic, sports, marketing, business… anything on earth and beyond.

As such, I would like to have different sidebar by categories and subcategories.

For example, in politic category, I may have different blogroll to the one in sports category.

It should be opened for everything that could be found on sidebar and not resticred to blogroll.

I’ve tried the wp-plugins but could not find any.

Is there any ready plugins for such feature?

I see this as a very useful feature to maximize a blog relevancies as well as the advertising dollars.