This is bubbl.us
You CANT however add images, so you are limted to text
You can create all sorts of mind maps using this software
You could use this to quickly summarise points for a theory
You could use this to list your intial ideas
You could use this to make minutes of meetings you have ad in your group
You can embed this mindmap on your blog using the "SHARING" section in the top right
You need to select the HTML code to do this