Intel out of top 5
According to the June 2007 top 500 supercomputer list, Intel is nowhere to be found in the top 5. The fastest Intel powered super computer is ranked #8 with Clovertown. AMD, on the other hand, took #2 and #3 spots with Opteron.
With the death of Itanium and bankruptcy of SGI, Intel simply does not have a viable solution for high performance computing. The 1970s FSB architecture Intel still uses is simply too primitive -- the FSB simply chokes under load.
Once K10 is out, Intel will be totally driven out of the high performance market.