Pretty freaking cool. Make a plugin for wordpress. Getting on people's blogs would give your great visibility and wordpress developers/designers are always talking about new and useful plugins.
Just add the option to make the link nofollow so blogs that don't want to squander their PageRank prowess can keep the linking for links they actually want to approve manually.
Another thing you might want to add is to build a wikipedia based spell checker for the plugin for misspelled names etc.
