I read about it quite a bit, and after tha last round of trackback spams, which dasBlog still doesn't handle, I decided to give it a try. The webseite is very clear, and the installation is a piece of cake. Drop the file in the bin folder, add some lines in Web.Config, and you're done.
The nice thing about it is that it should stop a wide range spams (comments, CommentAPI, refferers, trackbacks) using a single tool and without modifying the application at all. It's like Ascpecting the application.
If you've a blog and want to reduce spam, check it out.
"A man sits with a pretty girl for an hour, it seems like a minute. He sits on a hot stove for a minute, it's longer than any hour. That is relativity." -- Albert Einstein
"A book is like a garden carried in the pocket." -- arab proverb
""I have PMS and a handgun. Any questions?" (I saw this on the back of a porsche 911 ... kinda makes you think :)" -- Bumper Sticker