I read an article a few months ago that Washington state and another state (maybe vermont or virginia?) allowed you to go to take the bar exam without going to law school if you went through some sort of apprenticeship under the supervision of a lawyer. I know that doesn't answer your question but, thought it was interesting
Also, I know Thomas Jefferson in San Diego theoretically admits students without an undergrad degee under exceptional circumstances (read great resume, personal statement, or LSAT score). Hope this helps.