Well this isn't exactly a mini-dungeon, but I have been trying to get folks to help me stock my map over at Goblinoid Games.
GG thread here. Anyone that is interested can post here or there. This is a free project, I will edit and put together a pdf with a link in this thread if it ever gets done.
It is an overrun mine, made as a nod to the Caves of Chaos, so pretty much just lairs. It would be awesome if folks tied the lairs together with mention of alliances, battles, mistrust, but there is no overarching theme.