The Wayback Machine
Browse through 40 billion web pages archived from 1996 to a few months ago. To start surfing the Wayback, type in the web address of a site or page where you would like to start, and press enter. Then select from the archived dates available. The resulting pages point to other archived pages at as close a date as possible.
a must-see! brings back memories..
Some gupshup old versions:
http://web.archive.org/web/20041128030429/http://www.gupshup.org/