It looks a fan site created by a student in Hungary. Marcus Kowal is an instructor at NTC and it looks like he created the USA group.
Iím not sure who the sites creator is affiliated with but if I had to guess it would be IKMF. However after looking over the site it doesnít really seem to be organization specific more a place where people go to talk KM.
Interesting that you got emailed about it. I wonder where they got your email info from.