We describe TwitterFM a web application that explores ways by which social broadcasting via Twitter can be enriched with entertainment features. The system views Twitter as a dynamic set of 'radio stations', each one transmitting under a keyword (hashtag). The user can 'tune in' to the radio stations he wants. Once this happens all messages transmitted by this station are rendered into speech via TTS accompanied with music selected by the user and/or the system. TwitterFM analyzes the affective content of each rendered message and colors accordingly the sub-window in which it is displayed.