A little too much information to digest immediately - brain was fried on landing and didn't know where to turn.
I created a test project, and the first thing I noticed is I couldn't add name@shephard.org, but could add name@mailinator.com - weird.
For a brainstorm app targeted at the enterprise, or small work groups, I should NOT be exposed to Featured Lists or Open Membership Lists - I'd yank that - makes no sense for this class of App.
It _feels_ like a professional application - easy to get into, easy to start using. I like the way that it interacts with the user. VERY smooth - I like the way closing a Help Window opens up more space on the screen to work.
I wasn't sure what "adding users" to the list actually did - Send them an Email? Invite them? Anything? That needs to be more clear somewhow - It apparently sends out an invitation.