For those planning to submit an article to law reviews, Allen Rostron and Nancy Levit, University of Missouri at Kansas City School of Law, have a useful guide listing the submissions information for 192 law reviews. [Careful readers will notice that the abstract says "about 188" journals, but the document itself says 192.] It was updated in June.
And for essays intended for law review on-line supplements, Colin Miller, John Marshall Law School, has posted a Submission Guide for Online Law Review Supplements, covering 19 reviews.