Sorry about not keeping up to date on that. I had not really thought about it working until Fabian suggested it.So, it looks like XDMF output works. I am making a test now.
However, other stuff will not, like refinement, interpolation, cell geometry, and other discretization stuff.
What do you need working?
-- Dr Adrian Croucher Senior Research Fellow Department of Engineering Science University of Auckland, New Zealand email: a.croucher@auckland.ac.nz tel: +64 (0)9 923 4611