From Claria Corporation:
PersonalWeb learns your interests by collecting data from your various Web browsers about how you use the Web, and also identifies some of your computer settings and software applications. PersonalWeb then finds content to match your interests by analyzing Web sites, search results and other sources of information to identify highly relevant content and ads for you. After that, PersonalWeb creates your new home page, replacing your current Internet Explorer and Firefox home pages with a more personalized home page that brings your favorite sites and content to you automatically. Finally, PersonalWeb updates your content as your interests change, based on your realtime online activities.