Google announced the deprecation and closure of several of their APIs awhile back, notable ones including the Translate API, a few search APIs and the FeedBurner API. As of just a few days ago, the FeedBurner API has been shut down. Any application that requests subscriber information will fail to retrieve the data. This includes custom subscriber count widgets, iPhone apps like Ego, et cetera.
This raises questions about the future of FeedBurner. Is Google planning to shutter the service as well? Coupled with the recent discontinuation of AdSense for Feeds, things not looking too good. If they do end up phasing out FeedBurner, it will break a lot of feed URLs. I’m sure at least three quarters of the feeds in my RSS reader are hosted by FeedBurner. Some transparency would be nice.