The four new trinkets include Corroded Skeleton Key, Purified Lunar Dust, and Maghia's Misguided Quill. The melee and ranged dps trinket has not yet, at the time of this writing, been added to wowhead, I am afraid. However, rest assured, it looks as appetizing as the three previous. Personally, I cannot wait to get me one of the stamina trinkets.
For death knights, the two new sigils are Sigil of the Hanged Man and Sigil of the Bone Gryphon. Personally, I am more interested of the second choice, as raiding in top guilds guarantees that I need to buff my threat generation as much as possible, especially in preparation to the dropped avoidance, thanks to chill of the throne debuff.
In terms of cloaks, we have such nice pieces like Volde's Cloak of the Night Sky, Drape of the Violet Tower, and Sentinel's Winter Cloak to name a few. The first choice is obviously ideal for mages and caster dps classes. The second cloak, I can already see it on my discipline priest. There are total five cloaks, so if you felt left out by the choices, don't - there is most certainly something for everyone.
Other items, which are definitely too numerous to be listed in this humble article, include chest, hands, and waist pieces. The only let down was the disregard for a non-block wielder tank chest, but I am certain I will be able to compensate with tier10 set piece.
Speaking of which, I still could not locate the tier vendor the new set. They were not included among the Emblem vendor inventory, although it could very well be they just have not been added yet. As a good feature, the same vendor also turns emblems of triumph to emblems of frost and sells a new buzz item, Primordial Saronite. We do not yet know what this is for, however, a good guess suggests it will be a key ingredient in the Icecrown Citadel craft designs.
As a last change I noticed, are a series of new items in the Emblem of Triumph vendor, which has the been supplemented with reputation badges for all major northrend factions, each providing 520 reputation for their respected factions, and each costing a single emblem of triumph. This should make it a whole lot easier to grind the expansion factions for the various enchants, mounts and patterns.