BlueGene(L) takes the lead, with an Rmax of 70720 GFlops. It's followed by Project Columbia, at 51870 GFlops. Earth Simulator is third, with 35860 GFlops. Several clusters are benched at ~20GFlops. It looks like a site needs at least 10 GFlops to enter the top 10-- and it's even possible that Virgina Tech's System X will be knocked out of contention, if a couple of surprise entries publish benchmarks before the Nov 09 top500 list.