WordPress comment boxes tend to be dry, text editors. That’s kind of ok for people who know HTML, but even I get frustrated when I want to add a link in someone else’s comment box.
Here’s a really easy and pretty solution: Advanced TinyMCE Editor. This editor add a simple yet useful toolbar to the top of the comment box with the following buttons: bold, italic, underline, strikethrough, undo, redo, add link, remove link, and view HTML. To see it in action, go to the comments section at the end of this post – I’ve implemented it here on WordPressGarage.
Update March 10, 2008: I have disabled this plugin because a user notified me that it was causing Safari to crash. Oh well.