The Dynamo Users Group Announces Extensive Improvements to the Organization's Flagship Web Site www.DynamoUsersGroup.org

Vienna, VA - September 18, 2001 - McFadyen Consulting, founder and sponsor of the Dynamo Users Group (DUG), announced extensive enhancements to the group's web site located at www.DynamoUsersGroup.org. New features include a message board with post and response capability. Five message board forums, DAS Forum, DCS Forum, DPS Forum, DSS Forum and a General Dynamo Forum, currently exist for technical posts. Other enhancements include aggregated news related to ATG, ATG clients and partners, and Dynamo product developments, and a real-time ATG stock ticker. The DUG web site currently has over 1500 registered members.

"The DUG website is the central gathering point for the Dynamo user community," explained Tom McFadyen, President, McFadyen Consulting, "Creating and managing the DUG site is an honor for McFadyen Consulting. We see it as a way to demonstrate the strength of Dynamo as an eBusiness platform and to interact closely with fellow members of our user community."

Along with the new additions to functionality, www.DynamoUsersGroup.org continues to showcase cutting-edge case studies, allowing users to see how others are creatively applying the Dynamo platform. The Resource section remains as a compilation of periodicals, books, videos, white papers, and web links that contain technical information relevant to those working with Dynamo. The Events page contains industry events and events directly designed for users of the Dynamo platform. In many cases users can register for events directly from www.DynamoUsersGroup.org.

Since it's conception in early 2000, the Dynamo Users Group (DUG) organization and web site have provided an unbiased forum for the exchange of information and ideas for the ATG Dynamo user community. A primary part of the overall mission of DUG is "to bring together and make available valuable resources from Dynamo experts, end-users, and ATG which enable the entire community to get the most from their IT investments." This mission is carried out via regional educational seminars and online at www.DynamoUsersGroup.org. Regional events focus on the business applications of Dynamo, pulling together industry experts as speakers and showcasing case studies to demonstrate how others have experienced measurable business success through the use of ATG's Dynamo. Cities including Washington, D.C., New York City, Minneapolis, and San Francisco currently have active DUG chapters that hold events on a regular basis. www.DynamoUsersGroup.org serves as the central point for all DUG chapters and users worldwide. The site serves as showcase for the newest product features of ATG's Dynamo Product Suite.

About McFadyen Consulting
McFadyen Consulting (www.mcfadyen.com) has been providing full lifecycle implementation services on large-scale IT solutions integration for over a decade. The organization combines industry best practice experience, technology expertise, and visionary strategy to create market leadership and solve critical business needs for clients. McFadyen Consulting is a leading integrator of ATG's Dynamo eBusiness platform and has completed over 20 Dynamo projects. Dynamo clients range from Fortune 500 organizations to dynamic young companies seeking differentiation online. McFadyen Consulting's expertise includes eBusiness solutions, content management, ERP integration, 3-tier architecture, object-oriented development, supply chain integration, and electronic workflow automation. In the fall of 2000 McFadyen Consulting established the ATG Users Group (DUG) that meets quarterly in the Washington, D.C. area and New York City. DUG (www.DynamoUsersGroup.org) was founded to create an unbiased, educational forum for the exchange of information and ideas for the ATG Dynamo user community.

About ATG
Art Technology Group, Inc. ("ATG") (Nasdaq: ARTG) is a leading provider of Internet customer relationship management and electronic commerce products and services. ATG offers an integrated suite of Java application server-based products and services, as well as related application development, integration and support services. ATG's Dynamo® Product Suite enables Global 1000 enterprises, as well as new businesses using the Internet as their primary business channel, to understand, manage and build their online customer relationships and to more effectively market, sell and support their products and services over the Internet. The Company is headquartered in Cambridge, MA with additional locations throughout the U.S. and in Europe.