So far I’m really impressed by SpamKarma2. Installation is a breeze (unzip, done) and it already caugt a fair number of spams without blocking any legitimate comments. It also includes captcha‘s when it isn’t certain about a comment and checks if people actually visited the comment page and how long then spent there before submitting.
You can even see how much spam was eaten at the bottom of the blog, at the time of writing this post it’s at 13 🙂
Update: Akismet fixed, and re-enabled, now working besides SpamKarma2