For me canon has always been "all that has happened in the past." The "past" being, all the events prior to the beginning of a campaign. From that point on, the campaign goes where it goes. So I would say, "canon" is really a moot point for me; I agree with Chris Sims, especially regarding novels advancing a setting to which game material must conform.
Last edited by Turambar; 07-08-2010 at 10:36 AM.
It is the spirit of the game, not the letter of the rules, which is important. Never hold to the letter written, nor allow some barracks room lawyer to force quotations from the rule book upon you [...] YOU ARE CREATOR AND FINAL ARBITER.
E. G. Gygax, Dungeon Masters Guide, 1979.