If you're not in Denver, you can still pay your respects; just leave your own memory on the site, or below in comments! My favorite so far: "He had so many hangups, and he looked awful — especially in his later years."
This is a fun excuse for a geeky party, but not the first time the funeral-and-coffin theme has been used to bid adieu to outdated technology. Steve Jobs put Apple's OS9 in a coffin before the OSX announcement at an Apple event in 2002.
Update: In lieu of attendance, Microsoft has sent flowers to the IE6 Funeral crew to pay their respects!