The WYSIWYG editor for Mozilla has been released for both Radio and Manila. Here’s a screenshot.
If you run a Manila server, instructions for enabling the new feature are here. If you use Radio, see instructions for enabling the feature here.
As I noted in previous posts, the editor works with Mozilla 1.3b or later on all platforms. If you have any problems or bugs to report, post them to the discussion group on the Manila or Radio sites.