Over the past several months I've moderated or been on a number of panels with many of the top players in the location space. A common theme keeps recurring. When someone brings up rivalries between any of the companies, it is always downplayed in favor of an "everyone wins" message. I've been skeptical of that since day one, but as the space has exploded, there have been signs that a lot of companies are winning (as evidenced by both usage and fundraising). But now, as the space matures and larger rivals enter, things are starting to get more testy. 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.