I'll briefly overview the basic notion that one can look for entanglement generation via gravity in experiments. In particular I will present a recent proposal (joint with H. Muller and J. M. Taylor) using an atom interferometer coupled to a high-Q mechanical mass. The central idea relies on a new method of entanglement verification in time-dependent systems. Time permitting, I'll also make some comments about the interpretation of these entanglement experiments more broadly, particularly the relation to gravitons.