I don't know much about what PACER includes and what exactly is covered by Westlaw and Lexis-Nexis, but Altlaw (http://altlaw.org http://altlaw.org) is a "free,

I don't know much about what PACER includes and what exactly is covered by Westlaw and Lexis-Nexis, but Altlaw (http://altlaw.org http://altlaw.org) is a "free, full-text, searchable database of U.S. case law", and I've heard it being mentioned in the context of Lexis-Nexis. Also has the extra cool aspect of having been done by Stuart Sierra, whom all the Clojure folks around here probably know well.