Sorry, I didn't read your thread before because I'm not a diabetic nor have to cook for diabetic guests, but I was wondering what good suggestion could be found inside this forum when I came across with your question.
According to the Insurance, Retirement, and Wellness programs for the University of Texas System, there is no reason to renounce to dessert pleasure, and here are some hints and recipes to keep enjoying desserts,
http://www.utsystem.edu/benefits/newsletter/articles/2011/11mar_rec.htm
There is also a collection of recipes for diabetics that include the following desserts:
These recipes can be found here,
http://www.cs.cmu.edu/~mjw/recipes/special/diabetic-coll.html