1. Interfaces for the Crowd Crowdsourcing applications – Automatically ividing up a big task into smaller ones and having lots of people do those tasks to complete the large one Large group coordination – Flashmobs, etc. – Examples from MMOGs

2. [Social] Network Effects How does the value of an application change as function of the number of its users changes – Being the only person using email would be pretty pointless Implications for designing applications/interfaces – Indication of size of current (synchronous/ asynchronous) user base can help user expectations – Designs that include ways to help bring in more users or migrate users from competing applications

3. Crowdsourcing Dividing up tasks – Top-down design – Reduce ambiguity and need for interpretation – Engaging tasks make for better results Do the users care? Can it become entertaining? Include methods for validating results – Get same result from more than one person – Voting schemes – User ratings based on their results