Speaking as a previous Line Developer (and Publisher), the subject of canon -- at least from my own perspective -- pretty much mirrors Lou's opinion. Anything published under license should be considered canon. How you interpret it or apply it to "Your Barsaive" (or "Your Earthdawn") is up to you.
I can't comment on the "Terror in the Skies" thing -- that's always been canon from my personal POV and first I've heard of this. Not treating it as canon sounds pretty weird to me. As for Shosara and Sereatha? Personally, I've never formulated an opinion on those. If it's on a published map, that's fine. It's on the map there. If you don't agree with the location, "Your Barsaive" is yours to do with as you wish, possibly contrary sources notwithstanding.
As for comments on whether earlier editions should be canon or not (I refer especially to those talking about LRG's vision of historical events). Again, it's published under license, but can be ignored as you see fit.
As long as the degree of verisimilitude maintained is great enough to achieve a sense of continuity in the overall game line, then I think that's a win in its own right. There have been a LOT of authors involved with Earthdawn over the decades, some with markedly different views on "how things should be" (or "are"). That makes for interesting debate, determining who has the right of things, or if an idea was better in execution compared to concept, or whatever. And that too is part of the fun of being a FAN of such a rich tapestry of fiction in such an AMAZING game.
So, from a "bringing it back on topic" perspective, an Adventure Module List is a great idea, but simply citing which edition (ED1, ED2, EDC, ED3, ED3R -- my shame for not finishing this edition, sorry
, ED4, 3rd Party, etc) and sourcebook (page numbers, too, if that's doable), along with a capsule description and perhaps relative challenge level, is more-than-enough, IMO.Take kaer, James
Sending you a PM right now.