Geekscape has the press release:

Comic-Con International: San Diego (Comic-Con), the largest comics convention of its kind in the world, today announced it will be staying in San Diego for the foreseeable future.

Comic-Con reached a self-imposed attendance limit at the San Diego Convention Center (SDCC) in 2007 and has had to cap attendance at approximately 125,000 people each year since. In looking at ways to better accommodate the growing demand from attendees and exhibitors, the nonprofit organization considered proposals for a move to larger facilities in Los Angeles or Anaheim after the expiration of its SDCC lease in 2012. This decision keeps Comic-Con in San Diego through 2015.

So there you have it. See you in San Diego!