AT Atlantic Power Corporation

Alltel (NYSE:AT) Group President Kevin Beebe will speak at 3:00 p.m. CDT on May 22 at the Lehman Brothers Worldwide Wireless, Wireline & Media Conference in New York. Instructions to access the Webcast of the presentation can be found at www.alltel.com/investors. The public can access the presentation via the Investor Relations portion of the Web site on the day of the conference. It also will be archived on the Web site for three months. Alltel is a customer-focused communications company with more than 15 million customers in 37 states and nearly $10 billion in annual revenues. Alltel, NYSE: AT www.alltel.com