Last modified: 2008-02-26 05:05:38 UTC
If a category uses __HIDDENCAT__ (and thus, the categories aren't visible from the article), it would be nice to make them link-able in some way. The most logical way to me would be to list them below the transcluded templates at the bottom of the edit page.
I'm thinking of something else: Hidden categories shouldn't be listed when the article is viewed, but they should be shown below an edit preview. This is a raw idea, though; perhaps a second thought should be given.
Fixed by Werdna in r31257.