I'm remembering an adventure featuring the Demonweb. I think the players were going after a group of drow assaisins, or maybe the assasins came for the players. Either way, the PCs end up in the Demonweb for a bit.
Does that ring a bell for anybody? Name? Issue #?
There was one called "The Harrowing" by Monte Cook that was pretty darn cool. It was in Dungeon #84. :)
Yep, that's it. Thanks.