The 262 new submissions received between Wednesday 1 Oct and Thursday 2 Oct, announced Friday 3 Oct 2008, brought the total number of articles on arXiv past 500,000 — all openly accessible.
There are also more than 200,000 old versions of articles which record all public revisions since 1997. If the linear increase in submission rate continues, arXiv will pass the one million article mark in 2015.
See press release for more details.
Submitted by Kevin Lindstrom Liaison Librarian for Physics and Astronomy