Before commenting, WP Hashcash forces the users PC to execute a Client Side Javascript Code which does some calculating (<1 sec). As spambots can't handle JavaScript and even if they could, they would be slowed down by calculating stuff all day the spam problem should be gone :)Using Akismet works fine so far too, but every Week about 1 spamcomment slips though… let's see how WP Hashcash works :)