I'm building a CMS in PHP and one dread I have is that the users will have to fill the data in from existing Word (and Excel, but nevermind that) documents. Now, I've seen what happens when they carelessly copy and paste from Word to a textarea: the database got filled with crap markup.
Now, I could certainly strip all markup myself, but I'd have to start learning about it first. So I ask you: have you tested some functionality - plugins of the usual suspects (tinyMCE, FCKeditor, etc) that helps here? Bonus for the least intrusive solution.