WordPress.org

Does it work with any comment form?

Yes, if that form has the comment action hook: do_action('comment_form', $post->ID);

Does it work with other anti-spam plugins?

It will work with Akismet, but it is intended to replace any captcha plugins or other first-line anti-spam plugins.

Do you provide support for the plugin?

Yes! Just drop a line on the plugin site in the comments section.