The Cornell archives
http://arxiv.org/
included the following paper on a Black-hole Galaxy model of Dark Matter. This is the most far-out in terms of being away from conventional astrophysics paper I have seen on the archives. It s link and abstract follow:

The New Cosmology Fixed by the Einstein's Equivalence Principle
Authors: Rafael A. Vera
Comments: 15 pages, Latex2e. Work presented in the IVth International Cosmology Conference (Where Cosmology and Fundamental Physics Meet, June 2003, Marseille)
From the Einstein's equivalence principle and gravitational (G) time dilation experiments it is concluded that: when a system changes of G potential, some ''absolute physical'' changes occur to all of the frequencies, masses and lengths of every well-defined part of a system, compared with their original values before the G potential change. Such changes are linearly related to the G potential changes. They are independent on the forces and structure of the bodies. The increase of G potential due to universe expansion produces a G expansion of the bodies in just the same proportion as the distances. The distance measurements and cosmological red shifts don't depend on the time. The universe age must be quasi infinite. Matter must evolve in closed cycles between states of gas and the new kind of ''linear'' black hole that, after absorbing energy, can explode. The explosions of last ones must fix the evolution cycles of galaxies. Thus galaxies must evolve in closed cycles between luminous and black states cooled down by black holes. Most of the universe must be made up of black galaxies that are, absorbing energy from the rest of the universe. They must account for the low temperature CMB and the missing mass in the intergalactic space


http://arxiv.org/abs/astro-ph/0307193