Forgot to mention, I am giving this presentation to Dr. Karen Wilcox's computational design group at MIT. People here work on a variety of topics including model reduction, uncertainty quantification, multi-physics problems and optimization. So I think features like the subdomain restricted variables, the reduced basis methods and the adjoint sensitivity (and hessian) capabilities would interest them.
Hey,I am going to give a walk through demo presentation on libMesh on Friday. If there is some existing material that can help me out, please let me know.