SWTOR Game Update 2.0: Scum and Villainy is now live featuring Early Access to the Digital Expansion: Rise of the Hutt Cartel and the Operation: Legions of Scum and Villainy.

The Early Access to Digital Expansion: Rise of the Hutt Cartel is available to all players that pre-ordered Rise of the Hutt Cartel on or before January 7, 2013. The Early Access period is scheduled to last until Sunday, April 14th.

SWTOR Game Update 2.0: Scum and Villainy is also live including the new Level 55 Operation: Legions of Scum and Villainy, new Legacy achievements and rewards, new class mechanics and expanded talent trees. All our Sith Assassin/Jedi Consular and Sith Warrior/Jedi Knight builds and specs guides will be updated in the coming days.

More to come

Check SWTOR for the official patch notes.
http://www.swtor.com/patchnotes/