SilverStripe has announced that the upcoming release of their open-source CMS includes native support for Mollom. According to the announcement, SilverStripe's Mollom implementation protects page and blog comments, user registrations, forum posts, and custom PHP forms.
The SilverStripe Mollom installation instructions provide additional information on how to install and use Mollom with your installation of the release candidate. The installation instructions also show some screenshots of Mollom in action.
— Dries Buytaert