Google Website Optimizer
compuglot writes "Google has released the third leg of the stool in its quest to dominate online marketing. Google Website Optimizer is a multivariate testing application that allows users to test elements and combinations of elements in a website or landing page. The goal is increased conversions, and of course AdWords market share."
The optimizer is get posted on Salshdot, receive hits, collect ad revenue.
Subtle difference:
October's release was polydimensional, but this one is multivariate.
The forthcoming release, tentatively entitled "Google Website Optimizer", is expected to be panfactorial.