This plugin shows 'Content Icons' within each post. It is Compatible with WordPress 2.7. I have not tested this plugin with any other version of WordP
Simply put, Content Icons is a tool that an author can use to assign "icons" or "images" to individual posts... Similar in idea to having Topic Icons. However, biggest difference being, topic icons only display icons that are related or associated with the category (Hence Topic Icon). Content Icons allows author to assign icons such that a reader can readily make an association with the post.