Akismet

If you’re curious about some techniques of spammers and the intersection between economics and spam, check out this talk by Ross Anderson at Google:

We had a 40 minute downtime in our San Antonio location last night. This probably caused some obvious spam on your blog to be missed by Akismet.
We’re obviously looking on the systems side at what happened and how to prevent it, but also on the client side we’d like to make the WP plugin deal [...]