Akismet killed 50,000 comment spams on my blog since it began in October of 2005. Incredible.
Overall, the false-positive ratio for Akismet catching “good” comments on this blog has been almost insignificant. I find maybe 3-5 posts a month falsely identified. And less as time goes on, since it is learning by our actions.
Hugs, kisses, and the famous relle dance for all who have worked and continue to work on Akismet to protect bloggers from comment spammers. Thank you, thank you, thank you!