I've added a phpBB style edit toolbar (JavaScript-based) to the edit screen. It can be disabled in the user prefs. There's plenty of new text in Language.php to translate (tooltips, mostly).
The toolbar should work in all JavaScript browsers, but with different results:
1) Mozilla and IE: Select text and click a button to apply that tool (e.g. select text and click "bold" icon to make it bold). If you do not select text and click the button, you get an example text (e.g. '''Bold text''').
2) All(?) others: Select and apply is not supported - you only get the example text. Still useful as a learning tool.
In my version of Mozilla, select+apply works well unless the text is more than a screenful. In that case, the cursor jumps to the top again. Not so in IE. Not sure if this is a browser or JS bug. The JS is copied mostly from phpBB.
Committed to CVS unstable, please report any bugs you find.
Regards,
Erik