The 2010 EVO tournament will be at Caesars Palace in Las Vegas next year. You can find out information by clicking here:
Click Here.

According to the organizers:

“We are proud to announce that the event everyone has been raving about is back in action! The Evolution 2010 Main Event will be held on July 9-11, 2010 at the fabulous Caesar’s Palace Hotel and Casino in Las Vegas, Nevada.

“The Evolution Championship Series represents the largest and longest-running fighting game tournaments in the world. Evo events bring together the best of the best from around the world in a dazzling exhibition of skill and fun, as players and fans gather to honor the competitive spirit in an open format and determine a champion.”

Source: Get Your Tournament