Burbank, Calif. - TMZ, the celebrity gossip site joint venture between Time Warner's (NYSE: TWX) AOL and Telepictures Productions, announced on Thursday the launch of a new ad-supported mobile site, powered by Quattro Wireless. The site will offer news, text alerts, photo galleries and dozens of videos. TMZ said it will also launch an on-deck mobile website with mobile network operator AT&T during the second quarter.