Google quickly ushered its Google Plus Hangouts API out of preview mode, meaning apps built on the service can now be launched. Facebook also made changes to its API, bringing location to photo and status objects. Plus: redefining TV Guide via API, an OpenSocial platform and 17 new APIs.
Today we're marking another milestone in our API directory: we now list 4,000 of them. It's only been six months since we toasted the 3,000th. And, as we've said before, the site ended its first year, 2005, listing only 105 APIs. The whole web as a platform has come a long way and done so very quickly. There are some areas, such as social, which are incredibly popular. There's also a lot of room for expansion, as industries like travel and retail have yet to fully embrace APIs. How soon will we mark the 5,000th?