It wold be great if Publisher added Right Tab to the white space characters.
I have a few more white space characters at the back of my mind that I would like to see added to Publisher but don't want to obfuscate waters at the moment.
I use the right tab very often in church documents when some responses need to be right aligned and then bolded.
Right tab is especially useful as a sentinel character for Grep Character Styles when defining Paragraph Styles (e.g. Indesign) which I'm hoping will be implemented in Publisher too.
Think also of Prices, ISBN numbers, etc. that you might want to apply automatically different characters styles to.