Personally, I think it`s a good idea. There`s people who couldn`t actually be there for the two Game Jams, and that`s because they couldn`t be on the computer on that moment. So yeah, maybe one every month will be kinda cool!
Also, the new Movie Jam could be more fun then the Game Jam, since it`s a little easier, I think. In other words, people are more likely to enter themselves in the contest.
For the Audio Jam idea ( read some of the other post! ), it could work out! One musician does an instrument, an other guy does an other instrument, and etc.
And finally, for people who dosen`t like Game Jam, or all of the other Jams, you DON'T HAVE TO PARTICIPATE, NOR PLAY ONE OF THE GAMES OR MOVIES! This contest is for people who likes the Jams. If u no like Jam, u no play them. It's simple!