Blast Radius and ATG Enhance Strategic Partnership.

NEW YORK -- Strategic interactive agency Blast Radius and e-commerce software provider Art Technology Group, Inc. (NASDAQ: ARTG) are using their complimentary service offerings, similar target market and shared client groups to enhance their existing alliance through the ATG Partner Program. As Alliance partners, Blast Radius will be exclusively developing client solutions using ATG's Commerce platform.

Blast Radius and ATG have been working closely together for over eight years and have completed more than 50 joint projects for the world's top brands including Nike, Nintendo and Vodafone.

With proven expertise in strategy, technology and design, Blast Radius has a solid team of ATG Certified Professionals and has completed extensive training to ensure successful development and deployment of the leading edge e-commerce platform.

To continue delivering a strong record of outstanding client work, Blast Radius has created a dedicated ATG team that focuses on fulfilling the continuous needs and improving the customer experience of existing joint clients in addition to developing future business opportunities together. The team, including a dedicated ATG businesses development group, consists of key members across the organization who have extensive experience and expertise in ATG deployments.

"ATG has always been a key business partner for Blast Radius and is consistently recognized by both the analyst community and by clients as the top provider of marketing services and e-commerce platforms for B2C sites," said Chris Coghlan, SVP Client Services at Blast Radius. "We are excited about deepening our relationship as one of ATG's Accredited Partners. Our strategic commitment to the partnership has extended to the creation of a dedicated ATG team. In the year ahead the market will see more world-class sites powered by ATG and Blast Radius."

"Blast Radius and ATG have jointly delivered some of the best known and highest profile sites we have," said Darren Burris, vice president of alliances at ATG. "Blast Radius was named as ATG EMEA's full service agency of the year in 2007, recognizing their skill in delivering innovative online customer experiences that extend brand loyalty and increase sales by involving consumers in the brand. Blast Radius' understanding and expertise in user design makes them an outstanding partner."

ABOUT BLAST RADIUS

Blast Radius is a strategic interactive agency that builds long term relationships with global consumer brands to deliver innovative and profitable customer experiences. It does this by combining business savvy, experience design, and industry-leading technologies - including its work with ATG as an accredited partner. With offices across North America and Europe, Blast Radius clients include BMW, EA, Jenny Craig, Newell Rubbermaid, Nike, Nintendo, Virgin and Vodafone. Blast Radius is a proud member of the Wunderman Network and WPP Group.

ABOUT ATG

ATG (Art Technology Group, Inc., NASDAQ: ARTG) provides the e-commerce platform and e-commerce optimization services that the world's most customer-conscious companies use to power their e-commerce Web sites, attract prospects, convert them to buyers and ensure their satisfaction so they become loyal, repeat, profitable customers. Our e-commerce suite is ranked the #1 current offering and #1 in strategy by the industry's most influential analyst firms, and powers more of the top 300 internet retailers than any other vendor. Our eStara brand of e-commerce optimization services - including the world's most widely used click to call offering - dramatically increase conversions and order size and enhance customer support. ATG's solutions are used by over 900 major brands, including AT&T, Best Buy, Bulgari, Coca Cola, Continental Airlines, CVS, Dell, Diane von Furstenberg, DirecTV, eLuxury, El Corte Ingles, Expedia, France Telecom, Harvard Business School Publishing, Hewlett-Packard, Hilton, HSBC, Intuit, Jenny Craig, Louis Vuitton, Macy's, Mercedes Benz, Meredith, Microsoft, Neiman Marcus, New York & Company, NutriSystem, OfficeMax, PayPal, Philips, Procter & Gamble, Sears, Sony, Symantec, Target, T-Mobile, Tommy Hilfiger, Urban Outfitters, Verizon, Viacom, Vodafone and Walgreens.