Is there a script/hack/mod for MT that allows you to link back to the people who made comments on your blog?

For instance, if someone commented on an entry with a link to their site, is there anyway to have the next entry include their name linked to the URL they provided?

I always like to give commenters appreciation by including a "plug" to their site, but I've been having to do it all by hand. Any help would be appreciated!

automatic commenter plugging

Thanks so much. Very much appreciated.