According to Jalopnik/Mustang Heaven a few more details have been leaked about the new 2011 Mustang GT. Here is what they had to say...

Sneaky dealers have already gleaned more details from order screens on what (and when) to expect from the 2011 Ford Mustang. So far we've learned of the return of the California Special, an SVT performance package and more below.
* California Special (GT/CS) Returns (Package 402A)
* SVT Performance Package (Option 67F)
* Brembo Brake Package (Option 55D)
* 6-speed Automatic Transmission available
* (3) – 19-inch tire options available
* Order Banks open January 18, 2010
* JOB 1 begins March 15, 2010
As more Mustang details are available, we will be sure to post them up. Keep checking back for all of the latest 2011, 2012, 2013, 2014, 2015 Mustang V6 and 5.0L GT info!