The ITU (and more specifically Lisbeth Klastrup & Susana Tosca) is hosting the Digital Arts & Culture 2005 conference on December 1st-3rd.
www.itu.dk/DAC2005
(Note that for various reasons, the DAC in the URL must be in CAPITALS.)
Jill has already written a nostalgic piece on the history of the conference, so I will just say that DAC 1998 was the first real academic conference for me (speaking and all), and for that I will always have a soft spot for it.
DAC also embodied a shift between DAC 2000 and DAC 2003 where video games began as a sideshow to hypertext, virtual reality, convergence and other things we knew to be the future, and in a few years time became the dominant thing that people discussed. For good reason.