RIM has announced BlackBerry Web Signals, a new push service that will deliver relevant content directly to a user's handset. Like a cross between RSS feeds and SMS alerts, users can register their interests and when matching content comes across the wire it will be pushed to their BlackBerry. A handful of providers are already signed up, including CBC News and the Washington Post which will deliver breaking news alerts. Dada.net will offer music content, alerting the user when new tracks from their favorite artists show up on the website and Thumbplay has signed on for entertainment content. The application is available immediately for developers, though no timeline was given for a commercial release.