I completely agree that is important.
I have split the templating pages to make this easy from the theme side, but there are still some dependencies in the installation scripts.
I have been troubled about the best way to do it becuase it requires changing HTML across all openacs packages. This is something we need to do to make it easier to customize the looks. The idea of having lots of TCL variables to change colors and so on is sometning that does not go well with graphic designers.
Also, we have tried to make the classes we use somewhat similar to plone so we could resuse some of their skins.
cheers
Rafael
