Twitter announced of opening "Site Streams," a new feature on the Streaming API, allows services, such as web sites or
mobile push services, to receive real-time updates for a large number of users without any of the hassles of managing REST API rate limits. The initial version delivers events created by, or directed to, users who've shared their OAuth token with your app.
Via Site Streams, following events are streamed immediately and without rate limits: Direct Messages, Mentions, Follows, Favorites, Tweets, Retweets, Profile changes, and List changes. A subsequent version is planned to optionally deliver each user's home timeline.
Developers will have to apply for access to the beta, see Site Streams Beta documentation.