As announced in the New York Times, DC Comics will be rolling out a new logo on May 25th. Read more in the beat
"DC's old logo was designed by the legendary Milton Glaser in the '70s, and has been an integral aspect of the company. Yes, we're sorry to see it go..."
¶Enhanced power for Superman publisher -- article in the International Herald Tribune, by George Gene Gustines, The New York Times.
UPDATE: Read about the new logo, created by Josh Beatman of Brainchild Studios in the official DC Comics Press Release