Several posts have discussed aspects of the Legal Electronic Data Exchange Standard (LEDES) (See my post of April 14, 2005: European law departments; Sept. 18, 2006: electronic legal invoice delivery; Sept. 18, 2006: LEDES files for budgets; Feb. 21, 2007: data from law firms; April 22, 2007: UTBMS savings article; Nov. 30, 2007: data from survey of law firms; Nov. 20, 2007: a request for data; Dec. 2, 2007: proliferation of e-billing systems; and Dec. 6, 2007: innovative ideas in law department management.).
For more information, get in touch with the Legal Electronic Data Exchange Standard (LEDES) Oversight Committee.