Publicize on bbpress forum topics

Hi there!

You would need to add the support for Publicize for the topic Custom Post Type (CPT). Here are instructions on how to add that support:
http://jetpack.me/support/publicize/#custom-post-types

Upon investigating, it seems bbPress uses ‘topic’ as its CPT name.

I would recommend adding that functionality into a core functionality plugin, that way the changes you make aren’t theme-dependent. Here’s more information on how to do this here:
http://www.billerickson.net/core-functionality-plugin/

I hope that helps!