The text of the new Iraqi constitution is here, and it is discussed today a few doors down at Socialism in an Age of Waiting ('Constitution-making in Iraq'). Of constitutions in general, SIAW say:
[T]he precise details of the formal arrangements matter less than the political culture and social circumstances in which those arrangements are realised. Politics shapes law far more than law shapes politics.On that basis, they try to put some features of this new constitution into relevant perspective, and they conclude with 'two cheers' for it. Make your way over and read the full analysis.