Google Personalized web search delivers custom search results that are based on a profile you create describing your interests.
The slidebar (with which you can ask for more or less personalitazion) is cool.
But I still prefer the idea behind Eurekster: “Eurekster shows you What’s Hot with your friends“.
It would be great to be able to tell Eurekster “here is my FOAF file where my friends are already expressed” and then receive search results.
(via Mark Carey)