Arps ideas are definately alternate cosmology. They have something to do with quasars being ejected from galactic nuclei in pairs. I think most of his assertions have been explained using more accurate data from recent surveys such as the 2dF and Sloan surveys.
Here's one from Sloan:
http://arxiv.org/abs/astro-ph/0506366
I can't find the link but there was another done on over 1600 quasar/galaxy pairs by a goup from the University of Nottingham which found that "no sign of any quantised redshift appears". It's also at
http://arxiv.org somewhere.
Andrew.