> i also found it interesting that despite foursquare being 2 years old as of next week and having >7 million users (by comparison, facebook had 6 million users

> i also found it interesting that despite foursquare being 2 years old as of next week and having >7 million users (by comparison, facebook had 6 million users at 2 years) he still doesn't consider foursquare a success at all and worries about the company failing every day. I find that interesting as well. Most people would consider Foursquare at least 'successful enough' with widespread adoption and some revenue stream. Foursquare also gets nonstop press and a rival incorporated their API (http://techcrunch.com/2010/12/02/gowalla-3-foursquare-facebook-twitter/ http://techcrunch.com/2010/12/02/gowalla-3-foursquare-facebo...). That said, worrying about survival everyday is a good startup mentality to have. There are big players (Fb places, Google Lattitude? / Google-whatever-they-have-coming-down-the-pipeline) and possible upsets (such as http://techcrunch.com/2010/01/14/mytown-booyah-location-iphone/ http://techcrunch.com/2010/01/14/mytown-booyah-location-ipho...) ever looming.