BetaCAV, just as an FYI, the EarthDawn history up until the game system's departure from FASA is Shadowrun-canonical - including the Horror-based origin of dragons and all the other races, the origin of the Immortal Elves/Human/Ork/Whateverelse Immortal there is/was, etc. etc. Each GM, of course, can make up his/her mind how much (if any) of that to include in their game; I just keep it in the back of my mind as a fact, and tend not to bring it into the game, as much as Frederick the Great is a fact, but never winds up getting brought into the game.
orcmeat, feel free to go to town. In your game, you don't have to keep to canon - or even to truth. Anything that Harlequin says can be taken as fact, as metaphor, or even as a whomping big lie that just so happens to be fun to tell.