Data Driven Intranet Web Application Mock-up

Web application mock-up required. A data driven internal web application is being built on J2EE 6 and will use richfaces 4.0, when it is released. The web application is intended to replace a data driven legacy application. The legacy application handles, addresses, agents, contacts, vessels, supply ordering, spares ordering, and employees. It also has handles basic messages, such as basic email capabilities. The customer likes both google mail & richfaces look and feel so that is a no brainer. But page flow, navigation, menu structure, page layout & dashboard layout is an issue. I need someone to spend time using the legacy app and create a mock-up for us to base the new app on. if you need more info please ask.