Software projects typically rely on system analysts to conduct requirements elicitation, an approach potentially costly for large projects with many stakeholders and requirements. This paper describes StakeSource2.0, a web-based tool that uses social networks and collaborative filtering, a “crowdsourcing” approach, to identify and prioritise stakeholders and their requirements. Categories and Subject Descriptors D.2.8 [Software Engineering]: Requirements/Specifications General Terms Management, Documentation, Human Factors. Keywords Requirements elicitation, social networks, collaborative filtering.