Thought I'd read somewhere on the Cabin Crew forum that it was going to be an Icelandair 752 but can't find it now, sure it said something about 738 operating GLA-YHM 6x a week and once from MAN (the 7th GLA being cancelled), or something like that.....
All up in the air at the moment as to what will and what won't be operating, and as far as I can gather from the CC forum, they don't know what is going on either.