check in
Google Launches a Leaderboard for Check-Ins, But Foursquare Has Been Here Before
IAC’s Crowded Room: An App For Places You Might Check In
Let’s Monetize! How LocalResponse Turns Social Media Emphemera Into Mobile Ad Inventory
Foursquare’s Alex Rainert Talks iOS 5: The Technology Has Finally Caught Up With Our Vision
A Week of FourSquare Check Ins From Around the World [Video]
Facebook Just Bowed Out of the Check-In War With Foursquare
When Will Foursquare’s Relentless Onslaught of New Features End?
Foursquare’s New Growth Strategy as it Hits 10 M.? Users who Don’t Check In
Foursquare’s New Growth Strategy? Users who Don’t Check In
