We have more than 700 downloads on both of our avatar plugins for VanillaForums! We are really exited about this, because alot of people like our services and use them daily. Do you have a vanillaforum? Why not try out our awesome plugin too?
For normal heads: http://vanillaforums.org/addon/minecraft_avatars-plugin
For 3D heads: http://vanillaforums.org/addon/minecraft_avatars_3d-plugin