I've recently added a new custom taxonomy to an existing blog. For the last 100 or so posts I've been adding taxonomy terms (tags), and now have a good bunch of them in the taxonomy.
It would be really cool, though, to go back and tag up all the previous posts with the same tags where they are applicable.
It seems to me that this requires an exact match search of the posts database using each term in the taxonomy, and adding the term to each post where it is found.
Is there a plugin that will do this?