Ever wished you could give your readers a WYSIWYG comment area? Granted, there are a lot of reasons to prevent readers from adding things like images and video but that's no reason to give them an ugly set of instructions.
I've just posted a tutorial that explains how to add NicEdit to your WordPress theme in order to turn a textarea into a lightweight WYSIWYG. The tutorial requires a bit of theme editing (footer.php and functions.php) but I'd consider it entry level so don't be afraid to try.
Before and after screenshots will follow in the first reply.