10 and 25-man (normal and hard, judging by the item levels) has just been posted to the Armory. Edit: the loot is also on Wowhead now, complete with 3D models. As tipster Micah noted, if this is really the whole loot table, it consists entirely of armor tokens, weapons, and Invincible's Reins (which is listed as a guaranteed drop on 25-man heroic). The focus on weapons isn't exactly new for raid end bosses, but it's interesting nonetheless.
I haven't had a chance to go through the whole list yet, but as far as I can tell, there aren't any of the nifty proc-based items we've been seeing elsewhere in Icecrown. It's pure stats on Arthas drops (though Alex points out that
Which one's your favorite?