Smilies Themer Toolbar is a WordPress plugin by frasten that provides a toolbar to easily add custom smilies to comments.
It also integrates into tinyMCE, the rich text editor that you use when you write the posts.
It integrates with Smilies Themer plugin, and therefore requires it.
You can change your smilies theme in your blog, and the toolbar is automagically updated!
You can choose which smilies to show, and even in what order, via a easy drag and drop interface!
Plugin homepage: http://polpoinodroidi.com/wordpress-plugins/smilies-themer-toolbar/