Mind-mapping Blogger

There should be a free blogging service that let's you create, save, update and easily navigate mind maps.

Mindjet provides online service to its customers so they can have their mindmaps hosted for sharing. But we need something just like blogger that spawns a new community. Just like blogger it's free. Just like blogger it lets people communicate thoughts. But, the mans of communication is a mindmap, not a set of paragraphs of text.

Freeminds' mind maps could be hosted. How would it work though? I create a mindmap and update the same map?