CounseltoCounsel, Oct. 2007 at 12, describes four online tools from Martindale-Hubble that allow in-house lawyers to find out more about law firms they retain or might retain (See my post of Dec. 10, 2007 with its tips for selection of foreign counsel.).
Client reviews, on an objective third-party site, is one of the tools. A second one is the collection of peer review ratings. As the third tool described, a user can simultaneously compare up to four law firms or lawyers based upon various criteria. The final set of data, from LexisNexis atVantage, compiles information about litigation and M&A activities of firms. All this is available at www.martindale.com and all it of gives insights to inside counsel who want to retain an external law firm.