Copyright Holder Rights
Traditionally, publishers’ contracts restricted an author's use of published work in teaching and research. Contracts often prohibited placing the published work
Many publishers now anticipate an author's legitimate need to distribute and repurpose his work and no longer require exclusive rights to publication. Some publishers balance their interest in recouping publishing costs with the author’s desire to disseminate their ideas broadly, placing a short-term embargo on the open access archiving of the work.
Transferring copyright doesn’t have to be all or nothing. Publishers require only the author’s permission to publish an article, not a wholesale transfer of copyright. To make retention of rights easier, use the Scholar's Copyright Addendum Engine to generate a cusomized addendum to your publisher's contract, reserving the rights you need.
From http://www.youtube.com/openaccessnet