There has ben some changes to the MotoGP calendar for 2007, this is the latest version (events in italic take place on Saturday):
March 10 Losail, Qatar
March 25 Jerez, Spain
April 22 Istanbul, Turkey
May 6 Shanghai, China
May 20 Le Mans, France
June 3 Mugello, Italy
June 10 Catalunya, Spain
June 24 Donington, Great Britain
June 30 Assen, Holland
July 15 Sachsenring, Germany
July 22 Laguna Seca, USA
August 19 Brno, Czech Republic
September 2 Misano, San Marino & Riviera di Rimini
September 16 Estoril, Portugal
September 23 Motegi, Japan
October 14 Phillip Island, Australia
October 21 Sepang, Malaysia ...