My bet is that gravity is a perspective experienced existing within a quantum condensate. That is, gravitational information is instantanous. There are no gravitational waves, and there is no transmitting particle. I think gravity is more likely the opposite of entropy.
I'm (slowly) espousing my crazy theory on it.
http://hubski.com/pub?id=837 http://hubski.com/pub?id=1053
I'll update that soon.