From Carl Malamud and Law.Gov (which recently won a million dollar grant from Google for the effort to make all primary legal materials in the United States available to everyone) comes an announcement that in 2011 his project will begin providing a weekly release of the Report of Current Opinions (RECOP). This will initially consist of HTML of all slip and final opinions of the appellate and supreme courts of the 50 states and the federal government. The feed will include full star pagination. It will be treated as an open source project, and will be available for reuse without restriction under a Creative Commons License.
The data is being obtained through an agreement with Fastcase, one of the leading legal information publishers.