I am super excited about this app. I have used it sparingly because of the fact that I dont want to fill up my blog with Zaps. I do wish these would show up in comments but I understand that is beyond your control.
My hope is that you attack the Twitter crowd. I love the easy interface so there is little transition from that app. There are 330 Million twitter accounts, all paying people absolutely nothing.
I am looking forward to you getting a few weeks under your belt and working out some of the kinks in the system.
I am super bullish on this app.