USDA Agriculture Economic Research Service
This service is distinct from the USDA Economics and Statistics System at Cornell University. Besides reading about the mission and organization of the service (including e-mail addresses), you can also read many of their publications. You can also retrieve their data (much of it from the Cornell site). They also offer a "Special Topics Briefing Room," where they address a variety of topical issues. Finally, they offer an extensive catalog of their products.