Well there are quite a few, there's us (Serenity) we are fairly well known within the skilling community, supreme skillers is relatively new but they are growing well, theres the others, they are quite well known, there are also several level 3 skiller clans like peaceful and disruption. I am sure there are several other well known skills clans out there but the thing with skills clans is they don't constantly run into each other like pkin clans so they tend to be more independent of the clan community as a whole. Oh an from my experience skills clans have alot more of a family feel to them so they don't see larger numbers as a big deal, we sit around the 80 member mark and find it to be a good size, enough people to keep the clan very active but still small enough to get to know most, if not all, members :)