As a former jam organizer I have this to say;
Jams already complex enough, no reason to go all out on publishing. I like the idea of deadlines, but who will enforce them? It was easily organizing things, the hard part was getting people to meet deadlines. I was giving people more then 2 weeks to do things like character sketches and they still they didn't get it done. Sometimes it would get to the point that I had to track people down just to ask them if they couldn't do it. Some said they forgot!
Seriously, we should close this forum down if we can't do it in under 2 or 3 monthes max. Some people can do an whole comic by themselves in that time. If the jam is not around the top of your to-do list then you shouldn't do it.
Its no point starting another if only 4 people are going to go to the end with it.