More items from Onyxia added. 25-Man gives ilvl245 items and 10-Man ilvl 232.
Items already dropped from Onyxia on PTRs, below are a few items and I will update with more over the next few hours.

Onyxia 10-Man Loot Table

ilvl	Type	Slot	Item
1			Ashen Sack of Gems
232	Axe	One-Hand	Empowered Deathbringer
232	Dagger	Main Hand	Sharpened Fang of the Mystics
232	Gun	Ranged	Snub-Nose Blastershot Launcher
232	Polearm	Two-Hand	Reclaimed Thunderstrike
232	Polearm	Two-Hand	Reclaimed Shadowstrike
232	Sword	Main Hand	Glinting Azuresong Mageblade
232	Sword	One-Hand	Singed Vis'kag the Bloodletter
232	Sword	One-Hand	Gleaming Quel'Serrar
232	Sword	Two-Hand	Keen Obsidian Edged Blade
232	Misc.	Held In Off-hand	Antique Cornerstone Grimoire
232	Plate	Head	Faceguard of Wrath
232	Plate	Head	Greathelm of Wrath
232	Plate	Head	Frostforged Ringhelm
232	Plate	Head	Frostforged Helmet
232	Plate	Head	Judgement Cover
232	Plate	Head	Judgement Helmet
232	Plate	Head	Judgement Helm
232	Mail	Head	Dragonstalker's Helmet
232	Mail	Head	Gaze of Ten Storms
232	Mail	Head	Cowl of Ten Storms
232	Mail	Head	Coif of Ten Storms
232	Leather	Head	Bloodfang Mask
232	Leather	Head	Stormrage Hood
232	Leather	Head	Stormrage Antlers
232	Cloth	Head	Nemesis Skullcover
232	Cloth	Head	Circlet of Transcendence
232	Cloth	Head	Coronet of Transcendence
232	Misc.	Finger	Runed Ring of Binding
232	Misc.	Neck	Eskhandar's Choker
232	Misc.	Trinket	Shiny Shard of the Scale
232	Misc.	Trinket	Shiny Shard of the Flame
55	Bag	Bag	Enlarged Onyxia Hide Backpack

Onyxia 25-Man Loot Table

ilvl	Type	Slot	Item
1			Ashen Sack of Gems
55	Bag	Bag	Enlarged Onyxia Hide Backpack
245	Mail	Head	Dragonstalker's Helm
245	Cloth	Head	Netherwind Crown
245	Sword	One-Hand	Tempered Vis'kag the Bloodletter

Also, a new quest similar to An Injured Colleague has been added for the Alliance. It seems that the Highbornes are back ... (These quests do not have any real objective, they're just here to toy with your mind)