On Wednesday, May 11, the Robert Schuman Centre for Advance Studies will hold a symposium at the European University Institute on Power and Legitimacy: Reconciling Europe and the Nation-State (Oxford University Press, 2010), by Peter Lindseth, Connecticut Law. Details here.
If you can't make it to Italy, check out the on-line symposium held recently at Opinio Juris:
Comment 1 (Nicola)
Comment 2 (Bignami)
Comment 3 (Anderson)