"Apocalypse DnD" - I like that. There were some interesting tie-ins to Shadowrun, too, since Earthdawn was allegedly the 4th World to Shadowrun's 6th world. (The non-magical boring era between c4000BC and c2000AD was the 5th.) For some reason, I always thought of Earthdawn when I played Eberron. I guess it's because both had fairly high levels of magical use.
The original dice system was...weird. It worked fast enough, but it was different.
If you can pick up the core book cheap (< $10), it'd be worth it for the read even if you never play the game.