User blog comment:Sarah Manley/New Editor Scheduled for Sitewide Release/@comment-1091639-20110830063719/@comment-126761-20110830115227

We have been working on a lot of tweaks and improvements over the past few months - not all are immediately obvious, but for sure we have not stopped work on it. For example, tomorrow will bring an updated category module, plus a bunch of other tweaks and improvements.

As for preview mode: we have made improvements there over the past few weeks (e.g. running known extension JS on it) ... however, running custom JS on it is a complex task. It's on our list, and we want to improve it.