Happy Spamiversary!

On Saturday this week, the world will celebrate the 25th anniversary of spam, as the first unsolicited commercial message was sent on ARPANET on May 3rd, 1978.
Those look to celebrate in geeky ways can check out the etymology of the term or, for the truly geeky, read initial reactions, including a young Richard Stallman saying he would be in favor of spam.
(Thanks to Brad Templeton for all the great data.)