This plug-in contains a whole bag of different functions, all of which are listed in this blog post. It was written for DVDpedia but some of the functions can be applied to the other Pedias as well.
(If you'd like to install it in one of the other Pedias, use the 'Download' link on the right and then change the extension of the downloaded file: .pediaextras_b for Bookpedia, .pediaextras_c for CDpedia, .pediaextras_g for Gamepedia.)
Please note that this plug-in requires OS X 10.7 or higher.
Multifunctional Plug-in