Popular social check-in service Foursquare is going through some changes, and the most important of those is that the old v1 API is going dead, as we've known since March. Older apps, especially abandoned ones, will stop working then, as will any newer app that hasn't yet upgraded to the new API.
There is a new way to play FourSquare, the location-sharing game that just celebrated its first birthday. Kickball is an iPhone app that uses the FourSquare API (our FourSquare API profile) to let users check-in or see their friends. But it adds a few features that may have you leaving behind the flagship app that first made FourSquare so popular.
Instagram made API news today with new comment features, and a major upgrade. The Instagram Platform API has upgraded to Facebook's Graph API. This allows greater flexibility to access Instagram data from third party tools. Instagram commented that the API will be available to all developers soon.