I have some quite nice things working now, so thought I might put it in front of an audience again. Near real-time edit previews are working now, plus a few other neat things like template dereferencing.
Point moz at: http://81.5.150.113/wysi
As before, if you want to upload edits you'll want the PHP interface: http://81.5.150.113/wiki
Of course, there are bugs! But most normal syntax is now handled ok.
-- Jim
Ps. maybe there a better place than the tech list for this kind of announcement...?