Xtify

So was there some functional or scalability benefit to Linkedin in designing the 500 threshold or was Linkedin trying to encourage exactly the competitive behavior that motivated me to add contacts at a rapid clip?

For the first week of November in New York City, "drinks are on us," says meetMoi, a dating site hoping to lure users to their new location-based savvy iPhone app with rounds of free drinks.

On August 18th, Facebook launched their long-anticipated Places -- both a response to Foursquare and Gowalla and an articulation of Facebook's mobile strategy.

With real-time information about customers' needs and vendors' offers, there's a widespread shift to make use of the opportunities for granularity and personalization of offers around location and time.