FC2Video

It's been rolled out at SXSW before but now maybe this is for real, sojolife is a social badge that connects you to other trade show attendees, concert goers, etc.

For brand managers
Create a real buzz at your event
Increase brand engagement during and after your event
Facilitate REAL-LIFE social networks
Analyse time and location connectivity data across multiple events
Identify potential brand advocates
Manage follow up campaigns quickly and easily

For users
Cool, fun and easy way to connect with new friends
Easy to add new friends to social networks
A way to extend and share the event experience online
Something for free – collectible memento/souvenir of the event