I've been working on Artisteer 2.4 support and have it working with one skin you can see on demo.mojoportal.com, the skin is artisteer-24vertical1
The biggest problem is that Artisteer changed their css classes to lower case and since css classes are case sensitive it is equivalent to just changing them completely. So I had to add a setting in theme.skin for using lower case Artisteer classes in order to keep the skins made with Artisteer 2.3 working. But it means also that it is not possible to use artisteer-greenlagoon or artisteer-swirly1 for the start of a new skin for Artisteer 2.4 templates because those skins have the mixed case classes whereas designs generated with Artisteer 2.4 have all lower case CSS classes. So, I will have to make several variations of skins from Artisteer 2.4 to use as starting points for users to create new skins from Artisteer 2.4 and I will have to update the documentation.
I was really expecting the Artisteer vertical menu support to be something like the flyout menu they use for horizontal menus, but it seems in their designs the vertical menu is often used in conjunction with a horizontal menu and has duplicate links. It doesn't seem that great to use only a vertical menu. I've made it possible to use it in several configurations that I will document, so it can be a duplicate of the main menu or it can be the main menu or it can be a sub menu. In artisteer-24vertical1 skin I made it a sub menu so it shows child pages of the parent page in the horizontal menu.
Best,
Joe