I'm not sure the protocol for posting here but I'm the founder that was told to "start over". Probably won't but I at least wanted to give a mini-pitch, which I was told not to do on stage.
Flytivity is less like Sonar in that frequent flyers will share their travel itinerary before they travel, through the portal or most likely through TripIt. Flytivity pushes profiles of other business people that they might want to connect with in the airport, at the conference or traveling to that city via email the day before you travel; from there they can see how their connected (via linkedin (1st, 2nd 3rd level) or twitter) as well as other commonalities they might have with someone totally unconnected. You will also be able to initiate direct message right from the email.
Within the app the user can build a trip, check out who they might meet on future trips, see who's in town on a current trip as well as post in the city/conference forum about events.
With 460 million business trips on the books for this year, Flytivity was created with the business class traveler in mind. We know status and upgrades are important. We know you don't want to talk to just anyone, which is why you talk to no one. We also know that one face to face meeting can grow your business or career. We want to help make that happen.