This group provides a discussion area and resource for anyone who is involved or interested in the use of software visualization for requirements definition. This includes users or prospective users of tools such as iRise, Flash Catalyst, MS SketchFlow, HP Blueprint, Axure Pro, Balsamiq, or any other simulation/prototyping tool, including the many new SaaS tools which have sprung up over the past couple of years. We'll compare notes on the different tools, discuss methodology, and weigh the benefits of using software visualization over static wireframes or text to define requirements.