Not worth much in the way of information, but:

  1. Kristan Jensen, Andreas Karch. Holographic Dual of an Einstein-Podolsky-Rosen Pair has a WormholePhysical Review Letters, 2013; 111 (21) DOI:10.1103/PhysRevLett.111.211602

calculate that a pair of quantum entangled black holes would be a worm hole and equivalent to any pair of quantum entangled subatomic particles. (Apparently they use multidimensional string theory maths to show.)

Here’s the key point: if two people were inside the two black holes, they be in the “same” place, no matter how far apart, but, of course, what goes in, never comes out. Accordingly, no travel or communication through the wormhole.