After converting my categories to tags in WordPress 2.3, I still have a backup of my old categories and their assignment to various posts, and plan on adding them back in as Categories, and keep all the newly assigned former categories also as tags. I see a slight difference in them, unlike what is implied in this setup in WordPress. First, though, I have to find out how to get “Category Archives” pages working correctly. Only the first page of Category archives works correctly. It also knows how many pages of posts there are, but once I move back a page, the category filter is gone. THat’s why I’m only listing my default category until I figure this out.