[Dune] curvilinear grid

[Marco Cisternino]

Hi,
I saw among the methods for ALU3dGridFactory methods for inserting 
parametrized element into the coarse grid and arbitrarily shaped boundaries.
I'm really interested in these methods and I wonder if they are a good 
way to mimic curvilinear grids (I refer to insertElement method with the 
shared_ptr argument ) exploiting the ALUGrid logics.
But most of all I wonder if anyone of you is already working on this 
kind of grid using Dune.
I hope you will share your experience.
Thanks a lot.

Marco