Via twitter I found this tournament to be held in Monaco, starts on March 13 and ends on the 25th, organized by the Association Max Euwe.
The prize will be 216,000 Euros.
The 12 participants are:

Levon Aronian (Armenia)
Magnus Carlsen (Norway)
Leinier Dominguez (Cuba)
Vugar Gashimov (Azerbaijan)
Boris Gelfand (Israel)
Vasily Ivanchuk (Ukraine)
Sergey Karjakin (Russia)
Vladimir Kramnik (Russia)
Alexander Morozevich (Russia)
Ruslan Ponomariov
Jan Smeets (England)
Peter Svidler.

Official Website: http://www.amberchess2010.com/