I do not see the synergy between brain scale simulation and neuron simulation. They are both important they may need each other, but that does not imply synergy. I think that the developers should sit together and talk a few hours each week. Perhaps there are important intermediate simulation levels and this would lead to some synergy.
There is not much detail about what specific questions are to be addressed.
Other interesting links:
I suspect that some progress in understanding the brain will stem from arguing about how the brain could evolve. Understanding brains of other species will help here—simple animals first! That will be a long road but payoffs will be frequent!