“S. COTUS” at Appellate Law & Practice suggests heading over to this link at Public.Resouce.org, where, according to Robert Ambrogi, more than 1.8 million pages of case law have been released in what AL & P calls “somewhat raw form” (raw enough to title his post “XML case law”), apparently as an invitation to developers to catalog them in more usable form.  He adds there are some “fun” videos there as well, and includes a link to a re-enactment of Marbury v. Madison.