1. Sites which are useless for everyone e.g.: splogs, etc. 2. Some sites could be useful for a few, while being completely useless for the rest i.e. letting us

1. Sites which are useless for everyone e.g.: splogs, etc. 2. Some sites could be useful for a few, while being completely useless for the rest i.e. letting users remove certain sites from their results only 3. Like the ad-block software, people could subscribe to well-defined popular lists to get started. 4. I would also segment by verticals. E.g.:when you do a people search, you could bucket results into: a.) sites where the user, him/her self has entered the info - linkedin, facebook type websites b.) sites where a community has created a profile - wikipedia c.) sites that inteliigently crawl other sites and present the info -- lead411 , pipl, zoominfo, spoke, etc are useless to me