As a hexcrawl fan I'm always in need of more lairs and smaller sites for exploration, and Coldlight Press has done a good job fostering such (in a addition to becoming a welcome new voice in the module review game). A few months back they held an Adventure Site Contest, which ultimately produced some very nice small-scale adventure areas.
Now they have a second round up and open for submissions. If you have an idea, get over there and submit it. I need more lairs! You have until January 1.