Plugin idea: Promoting experts on sidebar?

Question

If you go to answers.com, you would see category experts on the sidebar.  This is a great way to promote experts, so they feel motivated to contribute.  An answers community, unlike forums, is based on experts contribution.

Is there a plugin for this.

Comments

another improvement that doesn't need a lot : open each month a question with a poll for 5 best helpers, take the 5 top rated users of the month and you will get a list from 5 to 10 logins to put at the top. The container exists for manual editing in /admin/layout.

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Sounds good.