Please note that these rankings are just re: faculty quality in this areas. They don't speak to job placement.
Leiter says:
BUSINESS LAW AREAS: CORPORATE, SECURITIES, COMMERCIAL LAW, BANKRUPTCY, ETC.
Excellent: Columbia University
Harvard University
New York University
Stanford University
University of Chicago
University of Virginia
Yale University
Also Strong:Cornell University
Georgetown University
Northwestern University
University of California, Berkeley
University of California, Los Angeles
University of Michigan, Ann Arbor
University of Pennsylvania
University of Texas, Austin
Vanderbilt University
http://www.leiterrankings.com/faculty/2002faculty_topchoices.shtml#busI know that Columbia has a transactional class/workshop that's supposed to be useful. I dont know if other schools do that.