How can I let my audience tag my posts?

I have over 400 interviews on my site and my audience keeps asking me for a way to sort through them.

I don’t have time to tag all 400 interviews. Do you think there’s a way for my audience to tag interviews themselves?

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Matt Mullenweg uses a similar feature on on his blog,, that lets users tag photos.

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He released the code as a plugin, Matts Community Tags. You will have to create a custom taxonomy for the tags and add some additional code to your templates to make it work. See the discussion on the forums for more information.