Mind Mapping? Brainstorming? Check it out!

This is a cool tool which we like to record ideas for many purposes!  It is called BUBBL.US!  Simple mind mapping can be done with little familiarity with the program and it's FREE!  Check it out and tell us what you think.  What other programs are you using that are similar? 

Here's a link!  http://bubbl.us/view.php?sid=7988&pw=ya71XC6HwyNHkMSRmVHlVLlVMcmR2TQ