MIT has established an Open Access Working Group in response to Elsevier's new article posting policies.
Here's an excerpt from the "New Open Access Working Group Formed: Formulating Response to Elsevier's Policy Change":
The wording [of the Elsevier posting policy] is very unclear; no one is quite sure what a "systematic posting mandate" is. Duke, for one, who has an open access policy very much like ours, has concluded that such policies aren't "mandates" since they allow people to opt out, and hence that they are not covered by the new Elsevier posting policy. But it is clear that Elsevier is trying to do what it can to undermine such policies, and to confuse faculty about what they are and are not allowed to do. Certainly that is the interpretation of the Coalition for Open Access Repositories, who, in their response, "strongly oppose the changes made by Elsevier to its article posting policies" and "join the research community in condemning Elsevier for its recent business practices and lobbying that undermine policies and activities promoting open access to scholarly literature."