I created a Mozilla party organizer, for the Mozilla 1.0.0 release (Dirty php-script) and officially attached the address to the bugzilla Mozilla-Party-Bug: #100309. It was a great success! After getting a slashdot article with 370 Comments :-D, over 3000 people had registered release-parties. After that publicity mozparty even got a link on the official Mozilla 1.0 release page – http://www.mozilla.org/start/1.0/, an article on derstandard.at, orf.at and quite a bunch of other newspapers and pages I can’t remember.
Have a look at some party pictures: http://www.schnitzer.at/mozgallery/