I met up with Nat and went to see Adam's talk on XML in PHP 5. I then spent much of the afternoon with Nat, Adam, John, and a few other PHP and Perl guys.
I went to dinner with O'Reilly and spoke a lot with Stas about his work with mod_perl. I also met Rael.
Geoff, Stas, and I walked to the strip and watched the fountain show, visited the Venetian (which has recreated Venice indoors - very cool), saw a volcano erupting at the Mirage, and saw the pirate ships at Treasure Island. We didn't get to see the pirate show, but maybe another night.