Mollom is one of four spam comment fighting services that I’ve covered before. Mollom has enough recent news to merit a fresh post. Centernetworks’ Allen Stern summarized as follows: Mollom Leaves Beta, Hits 10 Million Blocked Spams, Launches Paid Plans.
The Mollom site provides further detail. Dries posted that: Drupal is still the main platform for users with Mollom subscriptions, with Joomla! coming second, and WordPress third. The pricing page contrasts two levels of service: Free and Plus. Plus costs 30 Euros a month (which, at current exchange rates, is about $40, rather than the $30 Allen quotes).