Better user moderation. Admins can either deactivate a user or block the account entirely. Also, accounts are prevented now from “throttling” the forums; users can only post a maximum of every thirty seconds.
A real administration interface. We had been doing most of the site administration from various profile pages. It was never the right approach and was becoming increasingly unmanageable. The current situation is a big improvement but is still “more informative than useful”.
Caching. We’re working on some basic object caching to help speed up high traffic sites.