RecentChangesCamp is a great 3-day conference in Portland about wiki and a lot of interesting concepts that are linked to wiki. I went to RecentChangesCamp 2006 and 2007 in Portland, and I'm helping to organize RoCoCo, our RecentChangesCamp in Montreal. I'm not sure if two instances makes a valid pattern, but if things work out well it's possible we'll have a network of RCC events around the world.