Our small Plone team find that we have mixed results when working with external designers to theme Plone sites.
Does anyone know of any existing public resources focused on designing for Plone? Most of the theme documentation I have come across is focused on what's going on under the hood / the technical implementation aspects of Plone theming & Diazo.
What do you do when working with designers?
What things are useful to include in a design brief specific to Plone?
What kinds of examples / resources do you provide to display the different elements of a standard Plone site?
Is there a wider use case for this kind of documentation?
Our solution (meaning my company) is a methodology called "Gloss". Gloss provides a base Diazo theme which you use as a starting point for your designs. It has many rough edges but it certainly has sped up our production of themes. More details here: http://the-gloss-project.readthedocs.org/