David versus Goliath
Google Analytics (formerly Urchin) versus MeasureMap. An aquisition by a billion dollar company versus a small start-up project offshoot headed by Jeff Veen of AdaptivePath.
I bet Mr. Veen et. al. feel how Ev (of Odeo) felt after Apple launched podcast subscriptions on iTunes.
Let the battle for best metrifier begin!
Follow-up: No, I'm not a member of the private beta on either site.