Forgot this one - probably the best of the HPE series. Great background setting and some fun set piece combats.I liked Thunderspire Labyrinth - though a lot of what we did was the "side" adventures. It was pretty cool. Probably because the PCs were in hostile territory and couldn't easily regain healing surges/daily powers.
If you want to know more, I wrote up the sessions on my blog: http://richgreen01.livejournal.com/tag/courtsConsider my interest suitably piqued. May have to be a copy of Courts of the Shadow Fey to browse if not run.
Trit
You are thinking of Heart of the Forbidden Forge, Dungeon 155. I am fond of that one too, although I never ran it.