The New York Times has been in the forefront of experimenting with open technologies for journalism, with its varied news APIs (our directory currently contains 10 New York Times APIs) in the areas of news remixing, civic data, social activity, and niche topics. Now the Gray Lady is focusing on developers with a series of themed conferences.
A year ago Twitter was just a microblogging platform. Sure, it was a popular one, but it wasn't until the announcement of its geotagging API that it took its first step toward being a location platform. Since then, it has expanded its offering to include the four geo APIs I've categorized below.