This paper presents a model for transitioning existing web applications based upon a standard scripting architecture to Web 2.0 applications that rely more upon a Service Oriented Architecture, SOA. An overview of what is considered standard web application scripting practice and architecture is presented, and this is contrasted to the current architecture model for Web 2.0 applications based upon the AJAX “standards”. The benefits of moving to the new architecture are presented and explained in terms of the motivating factors for developing this model. The model is laid out as a methodology for making the transition and is explained as a staged process. Each stage is designed to produce a working prototype of the application.