Well, I wanted to give the whole "a challenge every month" thing a go at first, because it provides a constant foothold for people to start writing something. But I've also gotten feedback that this is too often.
So, what do you think? How often should we have challenges?
I'd also appreciate feedback on how long they should run, both in terms of absolute time (two weeks, a month, etc) and relative to the interval between challenges (Half the time between challenges, the whole time, etc.)