Here's the list:
Jody Adams - Rialto Restaurant, Cambridge, Mass.
Govind Armstrong - 8 oz Burger Bar, Los Angeles, Calif.
Graham Elliot Bowles - Graham Elliot Restaurant, Chicago, Ill. *
Jimmy Bradley - The Red Cat, New York, N.Y.
David Burke - David Burke Townhouse, New York, N.Y.
Wylie Dufresne - wd~50, New York, N.Y. *
Susan Feniger - Street, Los Angeles, Calif.
Debbie Gold -The American Restaurant, Kansas City, Mo.
Carmen Gonzalez - Chef Consultant, New York, N.Y.
Maria Hines -Tilth, Seattle, Wash.
Susur Lee - Madeline's, Toronto, Canada
Ludo Lefebvre - Ludo Bites, Los Angeles, Calif. *
Tony Mantuano - Spiaggia, Chicago, Ill.
Rick Moonen - Rick Moonen's RM Seafood at Mandalay Bay, Las Vegas, Nev. *
Mark Peel - Campanile, Los Angeles, Calif. *
Monica Pope - t'afla, Houston, Texas
Thierry Rautureau - Rover's, Seattle, Wash.
Marcus Samuelsson - The Red Rooster, New York, N.Y.
Ana Sortun - Oleana, Cambridge, Mass.
Rick Tramonto - TRU, Chicago, Ill.
Jerry Traunfeld - Poppy, Seattle, Wash.
Jonathan Waxman - Barbuto, New York, N.Y. *
* Also competed in the first season
Source: Entertainment Weekly
http://news-briefs.ew.com/2010/02/09/top-chef-masters-season-2/