So it turns out we do need SOME rules. It's fine to continue an active project or revive a dead one as your jam. If you do that just let us know the details of where you where when you started and where you ended up.
It is not okay to simply submit and old project as a jam entry. I know it's tough to get noticed, but spamming a jam isn't the way. I'm sorry. I will remove your entry if I believe this is what you're doing.