First off, a few corrections. There are 4 new NPCs, not 3, but 2 of them are standing side by side.
Second, Trozusk Ripscar is NOT east of Darkfall Gorge bridge, as the update notes say. He is southwest of the west side of the bridge.
Anyway, here is a summary. Full write-ups are at http://eq2i.com/articles/LU33
Trozusk Ripscar, 2 quests, Trozusk's Challenge (31) and A New Challenger (33)
Eneek Rialb, 2 quests, Eneek is No Snack! (32) and Eneek Needs a Snack (33)
Hamish Felderham, 3 quests, Razing an Army (25), Finding Feagon for Felderham (26) and The Apprentice (27)
Grot Leadarm... no idea... except for sneezing on you he will not talk.