I have long been a proponent of concept, mind and process maps as a means of capturing and delivering many kinds of knowledge. BiggerPlate is a sharing repository of knowledge maps. A great place to start to get an outline map to build on. The maps they share are usable by many mapping applications. Now they have established a means to form groups. An excellent way to think about sharing the construction of knowledge maps, and the updating both of technologies used and the maps themselves. Good step forward.