does anyone know any good services that can help to plan and manage conferences and other type of events? Especially twitter/facebook oriented.
I had to organize a small con recently, and couldn't find any service that can help with tools for it, i.e. I had to create a schedule for every room(used google calendar and it's API for this task), collect and moderate questions in twitter and show them on big screen(wrote a small GAE app for it), set up a page with info and directions how to get to conference(I've set up a small wiki for it).
I am thinking about putting everything together as a service, but maybe I am missing some well-known awesome startups, which can do all this and other nice things?