Our own Petros Mavroidis, with Henrik Horn, has created data (well, not really created, so much as gathered). It is available from the World Bank, which sponsored the research, at www.worldbank.org/trade/wtodisputes. The manual describes the data as follows
"[A] data set covering various aspects of the World Trade Organization (WTO) Dispute Settlement (DS) system that has been compiled in project financed by the World Bank. The data set covers all 311 WTO disputes initiated through the official filing of a Request for Consultations at the WTO, from 1 January 1995 until July 31, 2004, and for these disputes it includes events occurring until February 28, 2005.1 2For these disputes, the data set covers exhaustively all stages of dispute settlement proceedings, from the moment when consultations are being requested to the eventual implementation of the rulings. The data set contains several hundred variables, providing information on various aspects of the legal procedure. The total number of entries is approximately 17 000. The data set has been compiled on the basis of approximately 3 000 official WTO documents available at the WTO web site (www.wto.org).
Enjoy.