Other

Science Musings: A very thoughtful blog from science writer Chet Raymo.
boingboing: A great way to lose your day.
UbuWeb: UbuWeb is a completely independent resource dedicated to all strains of the avant-garde, ethnopoetics, and outsider arts.

xkcd: A webcomic of romance, sarcasm, math and language.
Saturday Morning Breakfast Cereal: Amazing.
Internet Archive: The Internet Archive is building a digital library of Internet sites and other cultural artifacts in digital form.