Below is a video explaining how to use PreCYdent, a new resource for free online court opinions. The coverage of the database is quite impressive -- Supreme Court cases going back to 1759, federal appellate cases going back to 1950, and a good number of federal district court cases since 2004. The site also has a sophisticated search engine and lots of neat Web 2.0 features like a browser widget and a Facebook application. For more, see Robert Ambrogi's detailed post from January 2008.