Twitter posted an update on its developer blog today, detailing the changes coming with v1.1 of the Twitter API. In summary, things aren't looking good for any 3rd party Twitter app. In fact, many will find themselves crippled (though not outright banned, it seems).
While some 3rd party Twitter clients like HootSuite seem to be in the clear, the company is making it extremely obvious that it no longer wants such apps to exist. To that end, a number of new limitations on how 3rd party applications can access Twitter will soon be implemented. Here are some of the important ones.