How can I edit a topic in this new forum style?

You can't. Once it's posted you've got 5 minutes to edit it.

Once we have mods again, hopefully we'll be able to have topics editted for us.

Also...I know the forum is new and everything, but we have a topic for this already Search Feature y'know

You can edit your first post for another 5 minutes if you post a message on your topic.