I ran an extended campaign for four years based on the ED/SR interconnection that I ended in 1997 just as the "Heart of Dragon" series of novel came out. I developed this storyline in isolation to Jak Koke, and I had no idea of the "official" FASA plot to whack the Big D.
The basic premise of my storyline was created from a ED book called the "Legends of Earthdawn" (currently available at www.stiggybaby.com the last time I checked) and the story on page 55 called the "Heart of Heroes." The short of it was there was a magic item, called the "Heart of Heroes" which had the ability to seal the barrier between our world and the metaplane of the Horrors. The Heart could only be activated by 9 chosen heroes, one each "name giver races" (dragons, humans, elves, dwarves, orcs, trolls, windlings, t'skrang, and obsidiman) bearing a key attuned to their own race. The last three created problems in 2056 because (obviously) the mana curve was not high enough for these to "express" naturally. Windlings had expressed in Tir Na Nog based on a reference in Paranormal animals of Europe (the sprite on pages 94-95 looked a lot like a windling to me, so I went with it.) The t'skrang had to be "grown"...my runners had a steal a sample of his DNA from a sperm bank (and that was a hoot). The runners also had to find a liferock and reinfuse it with mana to produce the obsidiman.
Similar to the novel series, Aztechnology, controlled by a servant of the Horrors, was attempting to create an artificial mana spike so that the Horrors could cross before metahumanity was ready. Most of the campaign was spent tracking down the other heroes (one of the runners in my party, an earth elemental aspected magician, was the human champion), the keys, and finally the heart of itself (which was in the possession of Aztechnology inconveniently enough). The last battle was appropriately climatic and most of the party died. The very last part of the battle, the villain, a great feathered serpent, was almost successful in bringing the Great Horror Verjigorm through a rift, when the party (with some help) was successful in destroying the feathered serpent. The Heroes had to sacrifice themselves in order to power the Heart, and successfully closed the rift. All in all, I liked my way of doing it better (but I am a little biased).
As a side note, I'm in the process of running a sequel based on the Book of Horrow & the pillars of Thera. Should be pretty exciting.