U.S. National Debt Clock - tracks outstanding public debt, and includes a per-capita estimate of the debt.
United States Treasury - includes a FAQ about the history, duties and functions of the Treasury Department and its bureaus.
About.com: Economics - Includes feature articles, link library, bulletin board, chatroom, and newsletter.
State-by-State Analysis of Income Trends - report that shows that income inequality continued to grow in most states in the 1990s, despite economic growth and tight labor markets. From the Economic Policy Institute and the Center of Budget and Policy Priorities, January 2000.