This site was created by Michael Lissner as part of a masters thesis at the University of California, Berkeley School of Information. Michael was advised by Assistant Professor, Brian Carver. The goal of the site is to create a free and competitive real time alert tool for the U.S. judicial system.
At present, the site has daily informationregarding all precedential opinions issued by the 13 federal circuit courts and the Supreme Court of the United States. Each day, they also have the non-precedential opinions from all of the Circuit courts except the D.C. Circuit. This means that by 5:10pm PST, the database will be updated with the opinions of the day, with custom alerts going out shortly thereafter.
The coverage of their corpus for a given court varies, but it is growing on a daily basis. They are working to integrate the documents from other online sites that provide free public access to court documents.
To see a detailed overview of their corpus (updated daily), visit their coverage page