OT tableaux seem to be designed with WYSIWYG editors, such as Word or WordPerfect or OpenOffice in mind. They do not come as natural to those linguists using e.g. LaTeX; it is too easy make a lot of mistakes in where one should put asterisks, etc.
Julien Eychenne, a phonology student who is finishing his PhD thesis in Toulouse right now, has written a small programme which works as a small WYSIWYG editor, just for tableaux: OTableau. Next to generating LaTeX output, the programme also calculates ‘fatal’ violations, and places exclamation marks and shading (if desired) accordingly. It’s a nice little programme.