It seems to address some of the issues I have had with other sites:
- You can have more than one color "post-it" on the brainstorm page - this makes it much more useful for categorizing
- You can comment on the "post-it" - I envision being able to ask for more elaboration, etc.
- You can "vote" for your favorite ideas - this is one thing I think is missing from the whole brainstorming process, what to do once you get all the ideas out. Vote - pick one for an action item. Do something!