IOP has created an instance of the arXiv repository called eprintweb.org at https://web.archive.org/web/20130803071935/http://eprintweb.org/S/. What’s the difference from arXiv? From the eprinteweb.org site - “We have focused on your experience as a user, and have addressed issues of navigation, searching, personalization and presentation, in order to enhance that experience.