So have you all gone and signed up for mmom? I now have confirmation that yes, it is allowed to collaborate with someone else to come up with 31 fics for the masturbation challenge. The exact quote from moonlettuce was:
2. Ooh, that's cheating, but I can ignore it if it gets more fic.(Would rather have two people post together than not at all *grin*)
I have it on good authority that David Hewlett naked and neatly trussed up would make her more happy than anything else, but signing up to play at mmom would be good too :).