I think a "preview post" option would be great. A lot of forums use it and it is good for catching mistakes, especially curly bracket mistakes! :D
I don't know if the computer version has it...it pribably does I'm guessing but maybe one on here would be pretty nice!
:/ only as an option, I don't like going through an added screen for the same result.
I would just edit the post if you don't like it. :)
EDIT: You can preview posts on the web forum.