Posted a few days ago on the KQ blog: Valhalla Rising
In short, write a 400-word pitch for a 32-page Pathfinder or AGE adventure and Wolfgang publishes the winner (by judge panel and populate vote).
(And since there certainly may be folks here who have ideas but don't necessarily know those rule systems, it's worth noting that collaborative entries are allowed.)
Of course it can be setting neutral, but any Midgard campaign material is fair game - I've been very taken with the idea of building out a couple of the 1-paragraph locations from Dark Roads & Golden Hells. So that's taking some kind of shape.