Finally had time to apply NotZed's suggestions (Thanks!) to the small evo plugin I wrote to remove duplicates, and as of evo 2.3.2, plugins can be compiled independently, eliminating the need of patching evo sources, really good stuff :)
IMHO, the next great step would be to create a small repository for plugins (i.e.: a evolution-plugins-extras VCS module), cluttering evo sources with plugins that will be barely used might not be very desirable, and OTOH cluttering the CVS with small software pieces like this would be crazy.
So, while I don't know where to put the thingy, the code is here. Enjoy!