Description: The April 2008 issue of Learned Publishing is devoted to the effects of new legislation requiring authors funded by the National Institutes of Health (NIH) to make their research articles publicly available on the PubMed Central Archive within 12 months of their publication. Editor Priscilla Markwood writes that "institutional subscriptions, especially for niche journals, could soon be devastated." At the same time, the Association of Research Libraries (ARL) has developed a Web-based guide to assist research institutions in implementing the NIH's new Public Access Policy, which becomes effective April 7. The guide is helpful to a range of campus constituencies that may be involved in implementing the new policy, including research administrators, legal counsel, and librarians. The guide is freely available for download. The special issue of Learned Publishing is available through subscribing institutions.