This internet archive is the hot topic of the day. What's great - as has been pointed out - is that you can easily access to it through code, since you can send it parameters through the url, just like this (REST rules).

10/29/01 update: Wayback Goes Way Back on Web.

10/31/01 update: How Big Is 100 Terabytes?

01/22/02 update: How the Wayback Machine Works.

02/11/02 update: IT managers brace for the inevitable: petabyte-size databases.

02/16/02 update: Inside Orbitz (ITA Software is, like Google and Alexa, throwing lots of Linux boxes with Gb of RAM to address scalability needs, apparently with much lower costs than mainframes).

02/19/02 update: A Talk With [MS] Database Guru Jim Gray.

11/26/02 update: Way back when (Brewster Kahle interview.)