MindBerry is the only BlackBerry app I know of currently that lets you create Mindmaps on your BlackBerry. The idea behind the app is to let you visually organize your thoughts, manage information overload, increase your productivity and creativity. Just think of brainstorming in grade school… 
MindBerry just let me know that they have released a version of their app that is compatible with the Storm and looks quite good. Not much crazy new in the Storm version other than a cool sliding menu but you can give it a spin with their 10 day free trial (OTA download). After the trial you can pick up the app for $12.95 in the store.
