I've been appreciating RealClearPolitics -- it links political articles from major newspapers from both sides of the political spectrum (with a slight conservative/libertarian slant, but I like it that way).
Wikipedia of course....number 5 most visited website on net. One that's not about interaction but Information....perfect for me, I don't have to get involved in anything just get what I need.....or any sharing site (torrent, p2p, collaborative websites). At least until that liberty get's taken from us all and makes the world a poorer place for everyone. Cheers