In reply to Ed:
It's not looking good at the moment - "Le 04/01/2013. Quelques lignes sont en conditions, prenez garde avec ces températures bizarres." La Grave conditions haven't been updated since before Christmas, which may mean something, (or nothing. Who knows?)
http://www.ice-fall.com/Page_Secteur.aspx?IdSecteur=45
However, no routes at La Grave have been recorded on Camp to Camp in the last few days. Again this may not mean anything, but instinctively, it doesn't bode well.
http://www.camptocamp.org/portals/245232/en/camptocamp-ice
At least there's ice elsewhere - Ceillac for instance - so if it's poor in La Grave (it wasn't good there this time last year either) you may have to drive elsewhere. In addition to Ceillac, there's Fournel and Freissinières on the Briancon side of the massif, but from La Grave I'd first have a look up in Alpe D'Huez. It's high and can give good ice climbing conditions when nearby areas are poor (as was the case last January.)
HTH
Dave