Jane Garvey presents the guests and subjects inspiring the most Twitter comment in 2011.
BBC Radio 4
Poet Musa Okwonga explores the downside of living a life on Twitter and Facebook.
3/3 Rory Cellan-Jones asks where social networking will go in the future.
With Julian Worricker. Are social networking sites an effective tool of protest?
5/5 Simon Cox presents a look behind the scenes of video game development.
Iranian net activism, plus we discuss blogging and censorship in China, Vietnam and Cuba
BBC World Service
Twestival - the global Twitter gathering, Open ID, technobrega music & piracy in Brazil