Wow, it's very high level but exhaustive in coverage with lots of links; for example, just what will be required to build practical exaflop systems?<p>One minor detail is that as you scale the CPU etc. 1000 times, you're only going to be able afford a 10 fold increase in power ("It is generally agreed that an exaflop system must consume around 20 MWs [!!!], otherwise their operating costs would be prohibitively expensive").<p>Recommended.