The battle over localized data continues to heat up, and according to rumor's Apple's next weapon against Google, Nokia and the rest could be a partnership with Foursquare. Last week TechCrunch noted a check-in tweeted by Apple SVP Eddy Cue, coincidentally at the same time Foursquare CEO Dennis Crowley happened to be in the San Francisco area. Now, the Wall Street Journal has followed up with its always-helpful "people familiar with the talks" who indicate that yes, the two are in early discussions about sharing data.

Currently, iOS features deep ties with Yelp, but Apple could swap in Foursquare and its check-in supported database, giving both a leg up on the competition. At the same time, Foursquare's iOS app received an update today, shifting location details like phone number and hours to the top, and bringing bigger photos and info after users have checked in somewhere. Of course, we'll have to wait for an official announcement to see what, if anything may arise from the talks, but with Google's Maps app off to a quick start on the App Store, the folks in Cupertino may not want to wait very long.