Our group just made another of its DM rotations, and we're just commencing on a new campaign with 1st level PCs. The initial adventure should wrap up Friday night, so I've emailed this link to our current DM for his consideration.
This was one of my experiments with creating an environment instead of an adventure. My adventures are usually fairly plot-heavy, whereas this sort of thing just "is." There are enough pieces that a DM can pull some things from the encounter table and spice it up the way s/he likes it. If you want to pit the hobgoblins against Grinning Bob and his gang, that's a way to go. If you want to have the hobgoblins split into two factions with one group haning out with the witch doctor and the other hanging out with the bugbear, that's another way to go.
I might do Lair of the Red Tooth next. This was my other major "environment" type scenario -- as such it's just a matter of redoing stats, traps, poisons, diseases, etc. into 3rd edition format. If someone has a different vote for what I should do next feel free to let me know.