My per-month filtered spam counts since the end of 2001 (via the Google Charts API). Last month peaked at just over 52,000 messages; by comparison, last year's peak was 33,000, and 2005's was "just" 17,000.
My average monthly totals for 2003 are close to my average daily totals today. Clearly Something Must Be Done; I propose that illegal torture is something, ergo we must do it. Hey, it worked for terrorism!