The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
From the Now Culture of Xeni Jardin and Boing Boing to the Ideological Ideas of Markos Zúniga (Daily Kos) and Glenn Reynolds (InstaPundit) to the Humility of Wil Wheaton and the Passion of Dave Winer (Scripting News), this is a Quick Portal to the Zeitgeist Blogosphere.
This comes from White Lightning Axiom: Redux who got it from Sitka Surfin who got it from BuzzStuff: Bloggers randomly link-out to other bloggers who then link-out to other bloggers, and so on, and so on. "Pay it Forward" in the blogosphere.