The U.S. International Trade Commission "provides trade expertise to both the legislative and executive branches of government, determines the impact of imports on U.S. industries, and directs actions against certain unfair trade practices, such as patent, trademark, and copyright infringement."
The Commission's Web site provides information about the Commission and its publications, investigations and cases (www.usitc.gov).
The ITC has an RSS Feed Generator that notifies you when petitions, complaints and other documents are filed with the ITC. Otherwise, you can just check the docket notification page periodically, or use a system like Change Detection to track changes for you.
ITC opinions and other documents back to 1975 are searchable on Westlaw (FINT-ITC). Section 337 cases can be searched on Courtlink (337 cases only). Patent-related 337 cases can be searched on Docket Navigator.
Documents filed in ITC cases are available free through the EDIS system.
The U.S. International Trade Library on HeinOnline contains a large collection of ITC materials going back to 1966. Many concern Section 337, which provides for expedited proceedings before the ITC to decide patent, trademark and copyright infringement claims concerning imported goods.