Q:
New NPC/event locations?
http://wiki.guildwars2.com/wiki/Lost_and_Found
Here you have all information about NPC location and the item they are looking for.
Riselight [WvW] – Elementalist
Smough The Cruel [WvW] – Warrior
Smough The Cruel [WvW] – Warrior
If you’re still on the memento collection part, they can be given to the npc’s marked with stars in Diessa and Wayfarer.
http://dulfy.net also has great guides on it