http://weblogs.asp.net/bleroy/archive/2005/06/29/416593.aspxScott Guthrie announced the Atlas project in a recent blog post . The Atlas project aims at considerably simplifying and enriching the client script development experience. It includes but is not limited to AJAX/callbacks and cross-browser client-sideenCommunityServer 2007 SP1 (Build: 20510.895)