Keywords: expertise sharing, collective memory, organizational memory, crowdsourcing, pervasive environments, collaborative help, escalier, collective helpEscalier is a new architecture for community-sourcing configuration settings, and by extention other types of pervasive data such as activity traces. The next generation of computational environments are likely to be so complex that users will not easily be able to keep up.Using Escalier, users can find out what system configurations will be stable in return for giving the community their configuration data.