Bit of a late reply :d
I've heard that this is a difficult race. For what seems like a completely flat area, the circuit has plenty of long slow hills. I'm hoping to do it in 2009 as I live there and I go running around parts of this circuit all the time.
In fact, it goes right past my house at the end of the race so I'll get the misses to cheer me on. Assuming that I've made it that far...