The showcase is now a post type. It’s pretty self explanatory for how all of that works. Just head over to the Showcase screen. (Same permissions as posts: Contributors, Authors, and Editors can all access the screen.)
For now, whatever ends up in “Description” is not visible, but since Title and Description are now two separate fields, you should go ahead and start splitting up the title field (all existing data was imported) as you may find it to be applicable.
We’ll introduce a separate /showcase/ page soon.
Props Zé for writing the core of the plugin.