oneverybootleg.nl — Best of the best. Very well constructed website with loads of useful information. From all the tours with all the dates to all the guitars, tourbooks, awards, releases, liner notes and even the lyrics.
mk-guitar.com — Another well known source of information for MK/DS fans. Notable vintage gear reviews, a store with real goods for guitar goons, also lists and interesting discussions. Sometimes even including the people in question!
amarkintime.org — MK/DS fans forum №1. Again, well constructed website, great people, it's up to date and alive. You get live setlist updates and sometimes even live streams from the shows! If you use other forums, what's wrong with you?