Salthorae
Imperial Mountain Dew Taster
Shardminds are not an Eberron thing, they are a Nentir Vale
Fully new race for 4e, so Nentir Vale, not FR except through the "here's how you could include them for your campaign here" kind of sidebar.
It’s the main idea behind the Black Spine adventure
I only remember the first invasion in this adventure, not the second you speak of... unless you're talking about the planned invasion that gets stopped in Black Spine?
Trinth
Well, and therein lies the rub eh? In all of D&D lore, there is no Githyanki Queen named Trinth outside of this adventure, at least that I've ever seen.
All I've ever seen is the Lich Queen Vlaakith.
So... maybe the Githyanki of Dark Sun are not supposed to be the Githyanki of the rest of the published worlds?
Dunno.