Welcome to the home of the Giant Intelligent Friendly Talking Roaches. I find this place extremely creepy. Talking spiders are very odd, talking roaches are just plain frightening.
The only one of these roaches you really have to talk to is Filth Spreader, and you don't even have to talk to him if you don't want to. He'll tell you where you can find the Filth Factory. The other way to find the Filth Factory is to look at the interior wall of of the little alcove in the northwest corner. One of the roaches has scratched a map there.
The only other things of note in here are a few potion making herbs scattered around. There's some Graymold and some Healing Herbs on the ground near the pool in the northeast corner, and there's a secret passage in the southwest corner that leads to some toadstools.
Once you've finished talking to everyone, found out the location of the Filth Factory and gotten the potion making herbs, it's time to head off to Kneece, which you can only reach by taking the ferry over from Kuper.