Given a post, I would like the “Previous” and “Next” buttons to take me to the next post within a Category, not to the previous published post. So far it looks like that is not possible in WordPress.com. I would like to request that this feature be added.
I suppose that is a given post were in different categories that might cause some problems… But if there were two (or 3, or 4, etc.) “Next” arrows asking the reader which “next” category post he wanted to read (“Next in Category A”, or “Next in Category B”, etc.) when such instances came about.