Does anyone know if Quark Express running on a Mac can export files in .htm or .html format?

HTML Import/Export
HTML export features become useful nowadays, as some customers want to publish on the Web books or leaflets made with Xpress. There are several Xtensions to get HTML from Xpress files on the Mac (HexWeb, BeyondPress and CyperPress). We don't know of any solution on the Windows side for the time being, but HexMac (HexWeb) has announced one for real soon now.

see this article (http://www.macdisk.com/xpressen.php3)

Cheers Jobeard - I am positive that the standard software will run the export .htm and .html files but don't have a MAC to hand to try with. If I got it out of the attic I could at least try the demo software!