Well, let's compare opterons running a 64 bit OS and code with itaniums, and the rest with Xeons. That would be somewhat more interesting. Opterons (cpu's) start at $169, so its hardly surprising it outsells Itanium. Compare it to Xeon, and you'll get a .. hmm.."sightly" different picture.
= The views stated herein are my personal views, and not necessarily the views of my wife. =