Here's one I've always just crutched by with doing manually - you have X amount objects and want to distribute them equally within a set space. See below:
ON TOP: is "Optical" method kerned font characters, outlined and ungrouped. Ready to be spaced.
ON BOTTOM: is the result of selecting all 5 characters (including apostrophe), setting the D as the anchor object, and trying one of the Horizintal Distribute Buttons in the toolbar. No go.
(Only critical at the moment because the word "DON'T" is to be printed 26" wide and I want precision.)
Yes I can manually calculate how much space should be between each char based on total length of space minus width sum of all chars. Problem is, I'm using a computer. Computer, you do it!