The 2007 calendar will host 17 races. 2006 hosted 18 grand prix'. With Fuji and Spa re-entering the list, it means 3 venues will disappear.
Bernie Ecclestone repeatedly said over the past few months, that Europe would be the continent where the first venues would disappear. And indeed San Marino's Imola is not on the 2007 list. The second European track to loose an F1 race will certainly be German. With the Nurburgring and Hockenheim, Germany has hosted 2 Grand Prix' over the past few years, with one officially being hosted in "Europe". One of the two will host 2007s German GP. A possibility is that the tracks will venue the Formula 1 races in turn.
Japan keeps it's race, also because of the Japanese interest in F1 with Honda, Toyota and Super Aguri. Suzuka International circuit has been replaced by Fuji, re-entering F1 after it's 1976 and 1977 races.
Dutch, Belgian and fans all over the world will be glad that Spa-Francorchamps is back. Great races have been raced there since it hosted F1 races on and off since 1950. Prepare for Eau Rouge!
As i said it is provisional,and Bernie could add or axe from this list.
I will keep an eye for the Finalised Information on this
The Stig