Last week at the Newhouse conference for Monetizing Online Business, I caught up with Foursquare Co-founder and CEO Dennis Crowley to ask him what every entrepreneur wants to know from the hottest guy in mobile start-up land: What is your single best piece of advice for aspiring entrepreneurs?

In addition to the answer Dennis offers in the video, he also noted that we should expect some exciting things from Foursquare this summer as they are working hard to hit the same tipping point which catapulted Twitter into the main stream. Given how well they’ve succeeded on Apple’s (Nasdaq: AAPL) iPhone and Google’s (Nasdaq: GOOG) Android phones, we think they have a great chance to make it to the big time.

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