Is there a thread on this forum that discusses this paper? http://arxiv.org/pdf/quant-ph/0205039v1.pdf
It would suggest that the quantum wavefunction is a representation of our state of knowledge of a system. Is this an accepted view?
Regardless of interpretation issues, one version of the epistemic view led to a very nice way to prove the quantum de Finetti representation theorem. http://arxiv.org/abs/quant-ph/0104088 (J. Math. Phys. 43, 4537 (2002))