No one wants to click a comment form Preview button. And if you let me choose between Submit and Preview, I’ll choose Submit everytime – only to notice my spelling error or blacklisted HTML tag after my comment’s been posted. Then, I’ll likely submit another comment right on its heels lamenting your shitty comment form’s lack of usability. It seems to me that inline previews with spell-checking and context-sensitive help are the way to go. Come to think of it, this might make a fun technology demo…