Traditionally, I consider the Thanksgiving weekend of 2000 the "Birthday" of DShield. I coded the first version of DShield over that weekend and made it public soon after. My records aren't that great, but here is an early screenshot of DShield.org courtesy of archive.org. There are a couple earlier once, but they are a bit too embarassing to post here :). What is now the Internet Storm Center was known as incidents.org back then.