Where will the location superstars check in this New Year's?

Wondering how to tell your friends where you are for New Year’s? There are a host of hot location-based startups which let you check in to a venue and broadcast your whereabouts to friends. Since I write about these services regularly, I decided to ask the founders of these companies where they’d be for New Year’s. The coolest choice of place meant that service got the honor my check-in.