The arXiv.org “e-print server” as it is called, is owned and operated by Cornell University and partially funded by the National Science Foundation. arXiv.org is well known in the scientific research establishment as the place to place leading-edge research results out in public before actual publication in peer-reviewed journals. The service is free to use, and constantly updated. Academics routinely use citations in the form arXiv/abs/0708.3818 which points to the paper available in PDF and Postscript formats. The preprint server is organized by scientific categories. My favorite categories are astro-ph (astrophysics), and gr-qc (general relativity and quantum cosmology).
I typically check my two favorite categories each morning to see what’s new. There is usually a lot new. For instance, on Friday, May 29, 2009 there were 60 newly submitted papers for the astro-ph category, and 20 for gr-gc. I’m normally looking for papers specific to my areas of interest, gravitational wave research, cosmology, and exoplanet discovery. There are at least several new papers per day for these subject areas, so the rate of availability of new research results can be a bit overwhelming. Nevertheless, I’m quite tickled because I’m assured access to all the latest scientific results. That’s hard to beat for a physics groupie like me!