Russell’s got a post about putting a registration-driven, personalized front end on the Google search API to build a service that takes your profile data–akin to FOAF–and then makes your search more “relevant” in contextualizing it. In addition, the service would be smart enough–and perhaps incorporate collaborative filtering?–in a way that provides a progressively enriched personal context–more ujique relevant–fort results.
That’s a paraphrase, but hopefully accurate. Makes total sense to me.