UpStage is a web-based venue for online performance; an open source server application that has been in development since 2003. Online audiences anywhere in the world participate in live performance events by going to a web page, without having to download and install any additional software. Upstage is calling for new works that are boldly experimental, exploring the dynamics of online communication and interaction. Upstage also invites collaborators from other platforms to contribute to the planning and organisation of the festival.