"This article critically reflects on how social media platforms such as Twitter (read here as a heteroglossic text and space) enable and encourage public participation in wider national conversations. The article explores this through the work of key bloggers/activists and citizen journalists, reflecting on how they construct as well as enable new participatory forms of civic/political engagement through Twitter. While the platform seems to have created its own hierarchies, horizontal participation is still much greater than with mainstream media formats. The discussion demonstrates the growing institutionalisation of the online space as an important platform for popular expression in Kenya, if at the same time offering an indictment of mainstream media's regime of ‘closure’ to outsider voices." (Abstract)