This process comes from Penguin Day. This process is great because it 1) Supports seeing a range of projects/software in a small group setting. 2) Supports those sharing there work improving there pitch.
You need a ration of audience to presenters of between 4-6 and 1. It works really well with 50 people and 10 presenters.
You spread the presenters around the edge of the room – each at a table or end of a table. You break the audience into small groups. You play referee and start a clock that goes for 4 or 5 min. Then everyone rotates and you do it again. In one hour each audience member will have seen 10 projects and the presenters will have presented 10 times. It is a good thing to do after lunch too.
I have myself speed geeked with an easel and some diagrams on paper to explain digital identity as a concept. They don’t all have to be code or demos.
Update: I have done several “mass” speed geeks with 20 stations and 100-150 people. It helps to get a numbered list of the different projects demoing. Then one sets out numbers in order on tables for the speed geekers. Once they are set it is good to get the audience to self organize into pods of 4-8. Then have one person from each pod raise their hands. If you have 20 speedgeekers and 20 pods – you are good to go. Get the pods to find a starting demo. Then for the next hour keep time every 5 min ringing bells inviting people to move onto the next station. People will really do their own thing and the initial pods will tend to disperse but everyone keeps circulating and sees demos.