ATG Webcast to Examine Business Benefits of Proactive Service; Industry Analyst and Business Leaders to Join ATG in Defining Topic and Businesses that Could Benefit.

CAMBRIDGE, Mass. -- ATG (Art Technology Group, Inc., NASDAQ: ARTG), the software provider behind the Web's richest customer experiences, today announced it will be hosting a live Webcast entitled "Sail from Service to Sales: Move Your Customers from Self-Service to Transaction," on Thursday, June 17 at 11:30 a.m. EDT.

ATG will be joined in the discussion by featured analyst Bruce Temkin, vice president and research director for Forrester Research, as well as executives from ATG customers Movielink and Conseco. The crux of the discussion will be the rise and evolution of proactive online service, or the process of keeping customers aware of events or changing business conditions as they occur with the goal of increasing customer satisfaction and reducing the flow of customer-initiated inquiries. The Webcast will address issues such as:

--The categories of events or business processes that could benefit from proactive service

--The definition of true proactive service

--The potential of proactive service to reduce inbound customer inquiries

To register for this Webcast, please visit: http://www.atg.com/selfservice/mainRegistration.jhtml

What:    Sail from Service to Sales: Move Your Customers from
         Self-Service to Transaction

When:    Thursday, June 17 at 11:30 a.m. EDT

Where:   Webcast at www.atg.com.

About ATG

ATG (Art Technology Group, Inc., NASDAQ: ARTG) delivers innovative software to help high-end consumer-facing companies create a richer, more adaptive interactive experience for their customers and partners online and via other channels. ATG has delivered category-leading e-business solutions to many of the world's best-known brands including A&E Television, Aetna Services, Inc., Alcatel, American Airlines, Barclays Global Investors, Best Buy, BMG Direct, Eastman Kodak, Ford Motor Credit, HSBC, Hyatt, J.Crew, Merrill Lynch, Newell Rubbermaid, Target, U.S. Army, and Walgreen Company. The company is headquartered in Cambridge, Massachusetts, with additional locations throughout North America, Europe, and Asia. For more information about ATG, please visit www.atg.com.