I've had the pleasure of watching Brett go through several iterations on his idea and I he's going to do great with Hall.com. Despite the "big" players in the space like Jive (my old employer), Yammer, and Salesforce, there is still plenty of room for innovation and disruption in group collaboration, including in the enterprise. It doesn't hurt that his investors (Founder's Collective and PivotNorth) are a great bunch. Good luck Brett! - Patrick Lightbody