I have fixed a problem in the Shared Word Diagram application. If the relative frequency of the words in one column was much less than that in another then you would see a large number of words overlapping that were impossible to read. It's changed now so that there is a minimum spacing in such situations so that the words are readable. This makes the tool much more useful for comparing differrent versions of the same document.
Thanks to Stewart McKie for pointing out the problem. Check out his site scriptcloud which lets you create content clouds from a screenplay.