Several organizations have published a statement on their policy with regard to open access publishing. Quite recently the British research councils published their statement on http://www.rcuk.ac.uk/access/.
There is a discussion going on in the Deutsche Forschungsgemenschaft, see http://openaccess.eprints.org/index.php?/archives/70-Optimizing-Open-Access-Guidelines-of-Deutsche-Forschungsgemeinschaft.html
The Wellcome trust has published their statement at
http://www.wellcome.ac.uk/doc_WTD002766.html
