I am running a fresh installation of BP 1.2-RC3(trunk2714) for WP 2.9.1 single user. Out of the box, a user is only able to add tags to a Forum topic at the time the topic is created — there is now way for that user or the admin to add/delete tags when editing the topic. This would be helpful.
The way you display and interact with tags in this Buddypress forum is much better. You can add tags to a topic and then edit or delete them any time after that. You also have the ability here for any user to add and delete tags from other people’s post — not sure if I’d go that far, but it would be nice if the topic creator and the site admin had that ability.
I tried just adding the tag fields from the forum.php file to the edit.php file in my child theme. It’d didn’t error our, but the tags that are already entered don’t appear on the post when editing, and new tags added when editing a topic are not showing up on the Forum tag cloud.