One of my favorite writers and speakers on legal tech topics is Michael Arkfeld. His book, The Digital Practice of Law, is probably the best one volume resource on legal technology that you can find because of his commonsense approach to the subject, even though some of the hardware sections have become a bit dated. He now has a blog (with RSS feed) on litigation and legal tech topics that should also become a great resource, particularly on litigation technology topics. In addition, his new book, Electronic Discovery and Evidence, has just been released and will probably become a standard reference text on this important subject.