From Jason Krause on Law.com comes this article regarding the Text Retrieval Conference Legal Track 2008.  The main points to take from this article are that, properly used, Boolean keyword searching is equally as effective as more “advanced” search technologies such as clustering and concept searching. 

However, as the article points out, Judge Peck (in Gross Construction v. American Manufacturers) ruled that litigation keyword searches must be negotiated with input from the actual custodians of the documents, and that linguists and search consultants may often be necessary for assistance.  In other words, as I’m fond of saying: This ain’t Google.  Creation of a search methodology is critical for success.