Hi there.
I would LOVE some help with this.
Especially as Silverstripe has just become a commercial partner with Mollom.
I have downloaded the latest SVN trunk of the Mollom Module, Spam Potrection Module, User Forms Module, and Silverstripe 2.3.1 and have installed everything correctly.
Currently I have got it to the point where the "Spam Protection" option shows on the User Forms API, but when I add it to the form it does not display on the page.
I am aware that Mollom does not show on the form by default but only appears when it detects spam, but I am able to enter spam-like text in the form and it lets it pass.
I would love any help with this as I think it is an awesome and much needed feature!