Foursquare

MG Siegler of TechCrunch:

The most obvious rivalry is between Foursquare and Gowalla. Even as the two battled for supremacy at the SXSW conference this year, both sides downplayed the rivalry. But the fact is, there is a rivalry (and they even play it up for next month’s UK edition of Wired magazine — see: pic above). Foursquare and Gowalla don’t talk to one another — in fact, their two leaders, Dennis Crowley and Josh Williams, had never met until a panel I moderated at Where 2.0 after SXSW this year. That’s not to say they hate one another, but they’re also not out there holding location potlucks to discuss how they can work together for the betterment of everyone.

Foursquare ad in Vegas, enticing users to check-in at the Miracle Mile Shops at the Planet Hollywood Hotel & Casino.