Chicago, IL — June 7, 2006 —LiquidPixels, Inc., the leader in Dynamic Imaging announced today a strategic partnership with ATG (Art Technology Group, Inc., NASDAQ: ARTG), whose licensed and on‑demand technology powers e‑commerce sites and supporting e‑marketing and customer service solutions for the world’s most consumer‑centric enterprises. Under the terms of the agreement, ATG will fully integrate LiquidPixels’ LiquiFire Dynamic Imaging solutions into its ATG Commerce OnDemand offering.

ATG delivers innovative software to help consumer‑facing companies create a richer, more adaptive interactive experience for their customers throughout the lifecycle of marketing, commerce, and customer care, and across the Web, e‑mail and call centers. The partnership with LiquidPixels will enable these companies to seamlessly utilize enhanced capabilities such as interactive zoom and pan, one‑to‑one targeted E‑Mails, Mix‑and‑Match product presentation, Automatic Color Change, Product Configurators, 360 Spin, and interactive Catalogs. The integration of LiquiFire into the ATG Commerce OnDemand service provides richer on‑line experiences without disrupting existing workflows.

“Our clients look to our technologies to provide the most dynamic, relevant, and targeted on‑line commerce and service experiences possible,” said Cliff Conneighton, senior vice president of marketing, ATG. “By integrating LiquidPixels’ LiquiFire solutions into our market‑leading commerce offerings, ATG’s Commerce OnDemand customers will be able to rapidly create a highly personalized, sophisticated, and elegant online buying experience, complete with both content and imagery that lead to customer loyalty.”

“LiquidPixels is proud to be ATG’s imaging partner as we together provide the next generation of e‑Commerce capabilities to our mutual customers,” said Steve Kristy, LiquidPixels’ CEO. “LiquidPixels’ LiquiFire software‑as‑a‑service, together with ATG Commerce OnDemand will provide an unprecedented coupling of the #1 e‑business platform with the #1 Dynamic Imaging solution.”

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 its periodic reports and registration statements filed with the Securities and Exchange Commission at 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 will not increase customer revenue across brands; that those customers leveraging ATG will not 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.