The arXiv this morning offered another interesting paper, this time by Gia Dvali and Cesar Gomez. These two authors, sometimes with collaborators, have written a number of related papers over the last few years regarding black holes and quantum gravity. Although interested, I'm afraid I have not taken the time to properly understand their papers, but here is a synopsis of a couple of the relevant ones as I understand them:
 First, there was the suggestion that quantum Einstein gravity might be selfconsistent in the UV, with the naïvelyexpected growth of scattering amplitudes being softened by the production of black holes at high energies. TransPlanckian momentum transfer becomes illdefined, because horizons form before any such processes can occur. There might therefore be no need for any fancier quantum theory of gravity.

The only other paper I want to mention is
this one. Here they
put forward an argument that, quantummechnically, black holes
should be thought of as bound states of gravitons. Let me try to
summarise their argument very briefly:
A gravitating system of mass $M$ sources a gravitational field containing, they say, $N \sim \frac{M^2}{M_P^2}$ gravitons, where $M_P$ is the Planck mass. The typical wavelength of these gravitons is the size of the gravitating source; as the source becomes more compact, this wavelength decreases, corresponding to a greater amount of energy being contained in the gravitational field itself. When the source reaches its Schwarzschild radius, the original source is (classically) hidden behind a horizon, and we can think of the entire rest energy as residing in the gravitons. From the paper:"For us the black hole is a boundstate (Bosecondensate) of N weaklyinteracting gravitons…"
They go on to explain Hawking radiation as the quantum depletion of this condensate: interactions between the gravitons will occasionally give one enough of a kick to escape the condensate. Similarly, graviton interactions may pairproduce any particles in the theory, and sometimes one of these will escape.