http://www.heise.de/ct/schachduell/
It's in German, but basically they're pitting some of the best chess engines
against each other on and dual Intel Xeon 2400 against a dual Athlon MP2000+.
Obviously the point is which processor can outdo the other, but the differences
in chess engines may well be of interest to people here.
(I got this off slashdot.org, if you fancy a 'lively discussion' on the matter
pop over and have a look)