The streak began on May 15, 2003, and has since surpassed the previous MLB record of 455, set by the Indians between 1995-2001.
The longest recorded regular-season sellout streak in American professional sports is owned by the Portland Trail Blazers, who had 744 consecutive sellouts from 1977-95.
Of course, this is partially the product of having fewer than 40,000 seats in a baseball-mad region. Still, better this than the sight of a place like Tampa. How fans can barely half-fill the stadium for a competitive team like that...they should be embarrassed. Or the Rays should be moved to a city that would actually appreciate them.