What about probiotics for ulcerative colitis? A brief scholar search shows some tentative promise:
http://www.nature.com/ajg/journal/v104/n2/abs/ajg2008118a.ht... http://www.nature.com/ajg/journal/v100/n7/abs/ajg2005272a.ht...
May only help for the more mild cases, but I know a number of people who speak very highly of probiotics for various digestive tract issues.