Adobe Developer Connection is running an article by Scott Stroz entitled Easy rich Internet applications with ColdFusion 8. The article, which was originally published by SitePoint, introduces ColdFusion 8 Ajax functionality, and walks through building a sophisticated ColdFusion powered Ajax based Rich Internet Application.
Dojo is a JavaScript toolkit used to build Ajax applications. The Dojo Toolbox is an AIR based desktop application which provides immediate (and offline) access to Dojo docs and resources and more. More details on the SitePen and Ajaxian.