I went on something of a scavenger hunt through my house today; it didn't turn up what I was looking for, but it did reveal my complete set of the original Dragonlance modules (DL1 through 13), compatible with the first incarnation of Advanced Dungeons & Dragons.
Flicking through the first module, Dragons of Despair, I was struck by some of its similarities to Keep on the Shadowfell. It features a small town (Solace), a semi-distant dungeon (Xak Tsaroth) and an expectation that the players will travel from the town to the dungeon and kick some butt.
Unlike Keep, it features some 80 encounters, three artefacts, a new player race, a foreshadowing of the future progression of the module line, a hundred square miles of fully fleshed-out overworld terrain, an eight stanza poem detailing the module's distant backstory, and a song, complete with sheet music (!).
It's hard to see under what circumstances 4th Edition would bestir itself to include sheet music in a module, which makes me suddenly disproportionately sad.
On the other hand, it should be said that the pre-rolled party that come with DL1 mixes third-level characters with sixth-level characters, it's very easy to lose the thread of the main plot while exploring the overworld, and as awesome as Raistlin is in the novels, schlepping around with 8 HP and the devastating might of Sleep for six months of play just does not cut it when it's you holding the character sheet.