I recommend the new white paper
The Economic Crisis and the Fiscal Crisis: 2009 and Beyond, just issued by the Brookings Institute. The authors are William G. Gale, Vice President and Director, Economic Studies at the Bookings Institute, and Alan J. Auerbach, University of California, Berkeley, Robert D. Burch Professor of Economics and Law, and Director of the Robert D. Burch Center for Tax Policy and Public Finance.