What does open access cost? arVix

Article in the Chronicle on Cornell University looking for additional institutions to help maintain arXiv which "is going well." I went back to one of Jennifer Howard's earlier items on arXiv.org: "[arXiv.org] holds nearly 600,000 e-prints of research articles, many of which appear there before they make their way through the formal journal-publishing process. It costs Cornell about $400,000 a year to maintain arXiv... Calling arXiv “a lifeline” for areas of the world with limited access to scholarly publishing resources, Ms. Kenney emphasized that arXiv will continue to be open access. Individual users will not be charged to submit or to review its contents..." http://chronicle.com/blogs/wiredcampus/cornell-library-proposes-new-model-to-keep-arxiv-going/20673 (January 21, 2010). Even distributing material for free entails costs.