Well, half a mouse brain, anyway.According to this article from the BBC's website, a couple of chaps from IBM's Almaden Research Centre have used a Blue Gene L supercomputer to run a "cortical simulator" that was as complex as half a mouse's brain.
They simulated 8,000 neurons with around 6,300 synapses on a machine with 4,096 processors, each fitted with 256MB of memory.
