A meta-social network profile. In all seriousness this seems like an awesome tool for people in HR, PR, or anywhere you have to deal with unknown peoples. Integration with desktop email clients- OutLook, ThunderBird, Mail, ect- would also be nice. I see a bright future if they play their cards right.
We have plans which we're going to test in the coming months. As much as we can say right now is that it will be freemium: we intend to keep the core service you see today free, and to charge for premium features.