I'm trying to find the perfect plugin for what I need to do. I have a blog that has posts about games. each post will have a category that assigns it to its game (although it could have another related field if need be). I need to have a block of HTML that appears at the bottom of all posts that are in the same category (think "where to buy this game" links) that should be entered only once. Ideally, they could edit this HTML or the content for this HTML in the admin, but I'll take what I can get.
Anything come to mind?