I often search for programming related information, and gladly use the Stack Overflow based results. More often than not, the answer I am looking for is already there. This unfortunately means that people blindly post their questions there, without it occurring to them that there might be a better place where actual experts are present. This better place is the Stackless Python mailing list.
For projects where the number of knowledgeable users present on Stack Overflow is high enough, it obviously serves as an invaluable resource. For a lesser used niche project like Stackless Python, not so much.