Using Bubbl.us you can create colorful mind maps online, share and work with friends, embed your mind map into blog or website, email and print your mind map or save your mind map as an image.
Bubbl.us takes away the mountains of paper that traditionally comes to mind when someone says "Let's brainstorm about.....".
In a professional context, teachers could use it as a collaborative planning tool for planning units of work. Students could also use this tool to collaboratively work on concept maps when they are planning for assessment pieces (which aligns with Kearsley and Shneiderman's Engagement Theory as well as Oliver's Learning Design and the Active Learning frameworks).
Personally, I find this tool a huge improvement on 'traditional' brainstorming. It makes ideas clearer and less chaotic than if you were using paper to brainstorm. However, if computers were in short supply in the classroom, Bubbl.us may not be appropriate for small group brainstorming.
A 'bubbl.us' on Autism