Dialog style and punctuation

In v2, I plan on updating the default font (Courier Prime Sans) to include unusual punctuation that’s typically only found in comics. The most obvious one to me is breath marks:

Blambot: Comic Book Grammar & Tradition

Using a good comic book font, these are typed by using curly braces ({ and }). Since I doubt there’s a real need for curly braces in scripts otherwise, I’ll reassign those characters to breath mark symbols. That should make things just that much easier for letterers copying from your script.

What else would you like to see along the lines of dialog/bubble punctuation and styles? The key here is to aid convention without forcing convention.