Over on the main Twitter blog @nk has written about a new Lists feature we're getting ready to launch: http://blog.twitter.com/2009/09/soon-to-launch-lists.html. We just wanted to let API developers know that we'll be shipping an API for it on day one. You'll be able to do things like create lists, add and remove users from lists, find out who has been added to a list and read the tweet timeline for a given list.
Stay tuned for documentations on the full Lists API soon. -- Marcel Molina Twitter Platform Team http://twitter.com/noradio