mizmo, in https://fedorahosted.org/marketing-team/ticket/54:

"it would be nice to use the category image functionality of zikula in our insight articles (it's kind of similar to how slashdot has different icons for different story categories)"

This work has actually been done, but not documented - so the task in this ticket is to look at the marketing ticket and write up a HOWTO for the design team so that anyone from the design team can work with category images in the future; contact the folks who did the original work if needed.