There is already MO as reece posted above.
More will come i expect, but give it some more time, I'd argue its still a bit too early, as there is still alot more that can still be done with SHV
It just takes someone with enough motivation to complile many indervidual exisiting SHV mods + future ones in to a single install, thats essentially what a mega mod is anyway.
I dont think their will be an actual 'supermod team' as Im pretty sure that kind of seperation its neither wanted or really needed here, the SHV modding community seems to be working pretty well together as a team already.
That said, In order to make a super/mega mod, one or two people will have manage and compile the files and in that sense someone is forced to 'take charge' and decide what goes in and what doesn't etc. that part of it isnt nice, but its pretty much logistically impossible to make a mega mod with out it.... any way im just rambling now...