Bubbl.us – Online Brainstorming Made Simple
http://www.bubbl.us/

Bubbl.us is a simple and free web application that lets you brainstorm online. Features include: a) Create colorful mind maps online, b) Share and work with friends, c) Embed your mind map in your blog or website, d) Email and print your mind map, e) Save your mind map as an image, and f) it’s FREE! This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.