Foursquare fights fake friends

Popular check-in application Foursquare is facing a problem that has long bedeviled social networks — spurious friend requests. And it’s dealing with violators by putting a cap on them.

Users now have a limit on the total number of friends …

Why Foursquare's so hard to pin down

What is Foursquare? CEO and founder Dennis Crowley offered at least a half-dozen different definitions of the location-based service in an on-stage interview with AllThingsD’s Kara Swisher today.

Fundamentally, Foursquare is a service that allows users to announce their whereabouts …