Oy, yes! The question is what it would look like.
I've a notion to begin producing modular subsystems for folks to drop into their games and would love to see other designers get involved in doing the same. I'm trying to get discussion forums set up on my blog site to help with it. I can see multiple takes on the same basic subsytems riffing off of each other in a discussion & design space, with formating templates available for all to use and version data that shows what design lineage the work is part of. I don't know if this is what you're thinking of, though I think it fits in with this.