Twitter officially bans all third-party clients, forcing people to use its own apps
While there has still been no announcement, Twitter has updated its developer agreement so that third-party clients are now prohibited. Over the course of the last week or so, we've already seen the likes of Tweetbot and Twitterific rendered useless after the company blocked API access.
Twitter later said that it was merely enforcing long-standing rules, but failed to provide any details or clarification. But now a new developer agreement has been published that slaps a ban on the creation of, "a substitute or similar service or product to the Twitter Applications" -- in other words, third party Twitter apps are now forbidden.