There are a few things at:
http://ckan.net/tag/read/law
http://ckan.net/tag/read/legal
Is this the kind of thing you mean?
--
Jonathan Gray
Community Coordinator
The Open Knowledge Foundation
http://www.okfn.org
Yes
I think everyone in the legal field pays up to either WestLaw or Lexis-Nexis for this. Yikes. If you can get those, there's fairly nice plain-text version to be had given enough scraping trickery. Sometimes universities have access; though outside law schools it's sometimes a more limited version.