Stimulus math (wonkish). Blog post by Paul Krugman, 10 Nov. 2008. Interesting brief statements on the effectiveness of monetary and fiscal policy, and on the size of the multiplier.
Fiscal Policy in the Shadow of the Great Depression by Brad deLong. Longer treatment of the use of fiscal policy in the Depression, with introduction making important points about the difference between "cyclical" and "structural" deficits, and of the importance of "automatic stabilizers."
Japanese Monetary Policy: A Case of Self-Induced Paralysis? by Ben Bernanke, Dec. 1999 (Princeton working paper; presented at ASSA meetings Jan. 9, 2000.) Of great interest, since one commentator on the speech above referred to "Bernanke-san" adopting measures similar to Japan's.