ATG Customer InterContinental Hotels Group Captures Prestigious 'Freddie' Award for Best International Hotel Web Site.

Business Editors/High-Tech Writers

CAMBRIDGE, Mass.--(BUSINESS WIRE)--June 1, 2004

Leading Hospitality and Travel Awards Honor IHG's Priority Club Rewards Site for Third Straight Year

ATG (Art Technology Group, Inc., NASDAQ: ARTG), the software provider behind the Web's richest customer experiences, today announced that the InterContinental Hotels Group's ATG-powered Priority Club Rewards Web site was honored as the best international hotel site at the 16th annual "Freddie" Awards recently held in New York City.

The Priority Club Rewards site was honored for the third consecutive year, a distinction that is representative of the strides IHG has made since 2001, when it selected ATG to power its network of sites, which includes hotel brands such as InterContinental Hotels and Resorts, Crowne Plaza, Holiday Inn, Holiday Inn Express, Staybridge Suites, and Candlewood Suites. IHG's sites provide some of the most personalized, robust user experiences in the industry today.

"InterContinental Hotels Group has become a standard-bearer for delivering the personalized customer experience in an industry where constant innovation and evolution is a competitive must," said Cliff Conneighton, senior vice president of marketing, ATG. "The fact that the Freddie Awards are voted upon by the consumers themselves that are frequenting these sites is a testament to the online commerce environment InterContinental Hotels Group has managed to create."

"As an industry innovator, IHG created Priority Club Rewards to be the industry's easiest and most valuable customer loyalty program. By using ATG technology, we've been able to deliver new online features, services, and conveniences very quickly, increasing the value to our members and attracting new program members at a record-setting pace," said Del Ross, Director, Global E-Commerce, InterContinental Hotels Group.

Introduced by InsideFlyer magazine in 1988, the Freddies allow consumers to rank airline and hotel programs from their point of view. The awards, which were presented April 29 at the Embassy Suites Hotel in New York City, have grown to become one of the most prestigious consumer-generated awards in the industry.

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, Walgreen Company and Wells Fargo. 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.

About InterContinental Hotels Group

InterContinental Hotels Group PLC of the United Kingdom (LON:IHG, NYSE:IHG (ADRs)) is the world's most global hotel company and the largest by number of rooms. InterContinental Hotels Group owns, manages, leases or franchises, through various subsidiaries, more than 3,500 hotels and 535,000 guest rooms in nearly 100 countries and territories around the world (www.ichotelsgroup.com). InterContinental Hotels Group owns a portfolio of well recognized and respected hotel brands including InterContinental(R) Hotels & Resorts, Crowne Plaza(R) Hotels & Resorts, Holiday Inn (R) Hotels and Resorts, Holiday Inn Express(R), Staybridge Suites(R), Candlewood Suites(R) and Hotel Indigo(TM), and also has a controlling interest in Britvic, the second largest soft drinks manufacturer in the UK.

InterContinental Hotels Group offers information and reservations capability on the Internet - www.intercontinental.com for InterContinental Hotels & Resorts, www.crowneplaza.com for Crowne Plaza Hotels & Resorts, www.holiday-inn.com for Holiday Inn hotels, www.hiexpress.com for Holiday Inn Express hotels, www.staybridge.com for Staybridge Suites hotels, and www.candlewoodsuites.com for Candlewood Suites, and for the Group's rewards program, www.priorityclub.com.

For the latest news from InterContinental Hotels Group, visit our online Press Office at www.pressoffice.ihgplc.com.

Enrollment in Priority Club Rewards is free. Guests enroll online at www.priorityclub.com, by calling 1-888-211-9874 or at the front desk of any InterContinental, Crowne Plaza, Holiday Inn, Holiday Inn Express, Staybridge Suites or Candlewood Suites hotel.

(C) 2004 Art Technology Group, Inc. ATG and Art Technology Group are registered trademarks of Art Technology Group, Inc. All other product names, service marks, and trademarks mentioned herein are trademarks of their respective owners.

This press release contains forward-looking statements for purposes of the safe harbor provisions under The Private Securities Litigation Reform Act of 1995. These statements involve known and unknown risks and uncertainties that may cause ATG's actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activity, performance or achievements expressed or implied by such forward-looking statements. Important risk factors affecting ATG's business generally may be found in their periodic reports and registration statements filed with the Securities and Exchange Commission at www.sec.gov. Risk factors related to the subject matter of this press release include the possibility that the ATG product deployment will not be successful, on time or significantly enhance the user's Internet experience or handle user volumes; that those customers leveraging ATG won't have the opportunity to increase revenue and decrease future costs; the need to adapt to rapid changes so products do not become obsolete; the possibility of errors in ATG's software products; the possibility that the solution will not make customer implementations faster or more flexible or permit the customer to meet its customer-facing or infrastructure requirements; that the ATG product will not continue to be integrated with third party applications servers or will not support all Web services enabled systems; that ATG's product strategy may change in the future; and the risks and costs of intellectual property litigation. ATG undertakes no obligation to update any of the forward-looking statements after the date of this press release.