Today, not only the amount of information exploded, but the information is also fragmented in size and floods into our brain from all types of sources. Traditional tree-based categorization method and linear text editing has started to show their deficiency in effectively helping us consume those information and turn it into our knowledge. At the same time, organizing information in a networked way with spacial representation, said to be more effective and intuitive, has begun to shine in some knowledge management communities.