Williamsn is correct -- the html editors out there that Renderosity can use for commercial purposes all essentially rely on built in capabilities of the browsers themselves, typically via javascript.

Opera, Safari, and most other browsers outside of the Mozilla/IE grouping simply have no ability to support these editors. Nor are they likely to.

Incidentally, wait until IE7, which already has several fixes for well known CSS/HTML issues that IE6- was buggy as all get out about. And adds support for more stuff, which, incidentally, will require changes to all the CSS pages already being used.

That's hitting the internet in full this fall (about, oh, 6 months from now). Right about the same time that use of the