Web 2.0 is changing business processes by enabling instant feedback, content generation and sharing. Many executives see web 2.0 projects as experiments, subject to less stringent investment criteria than other projects, but the business case for such investments needs to be made. This tool takes CGMA designation holders through the process of creating a business case for web 2.0 investments. It also lists the lessons learnt by 20 organisations that have invested in web 2.0.