Here are some examples of what I managed last year:
http://www.flickr.com/photos/1600580...7623964047053/
The first 2 were taken from the same spot, on the ridge along between Dunlop and the Tertre Rouge esses. You probably need a larger zoom than my camera (10x) to get very good images though. The next is at the Tertre Rouge esses, it's probably the best spot on the circuit for photography, but the downside to this is that it is always busy. The 4th photo is taken from the banking just before Tertre Rouge. It's very steep, but you can get some great shots. The final photo is at Arnage: you can just about get a catch-fencing free photo of the cars before they disappear off into the countryside.