I know a lot of people are completing Caves of Chaos, so I figured I'd check with WotC and see if it was okay to release a free adventure meant to be used with the playtest. The response I got was that it's fine as long as I don't reprint any material contained in the playtest packet.
So in my spare time I put together an adventure I'm calling Rats in the Sewer.
It's meant to be the the first in a trilogy, so if people enjoy it I'll write up the other two.
(Also note that while I run a small publishing company, I treated this more like a fan product, so it doesn't have any fancy formatting or art.)
Read more: http://www.enworld.org/forum/showthread.php?327075-Rats-in-the-Sewer-A-D-amp-D-Next-Fan-Adventure#ixzz2kIaiF3NS