The Mutual Learning Exercise on Open Science has released Open Science: Altmetrics and Rewards.
Here's an excerpt from the announcement:
Its focus is on three topics: 1) The potential of altmetrics—alternative (i.e. non-traditional) metrics that go beyond citations of articles—to foster Open Science; 2) Incentives and rewards for researchers to engage in Open Science activities; 3) Guidelines for developing and implementing national policies for Open Science. It identifies good practices, lists priorities and outlines potential courses of action for the best possible transition to Open Science.