I was most intrigued by the Polar Bear people and would be interested to find out if they are an NPC faction or playable race. Unfortunately, I read through the FAQ and they are not exactly a playable race:
Will Guild Wars 2 have non-human playable races?But hopefully, Norn, can shape shift into being a polar bear, because that would be cool.
Absolutely! In addition to humans, players will be able to create, customize, and play a variety of non-human races.
* Charr - Ascalon's conquerors, the charr are ferocious, warmongering creatures--the intractable foes of humanity. Now, as greater dangers threaten their conquests, charr legions and their war machines prepare for battle.
* Norn - The norn are towering brawlers from the frigid northern lands who can shape-shift into mighty bestial forms. Driven from their homeland by a force beyond reckoning, the norn have regrouped among the dwarven ruins of the Shiverpeaks.
* Asura - The asura, who once ruled the caverns and tunnels below Tyria, are an advanced race of small size and great intellect. Now that they have risen from below, the asura aim to rule the surface world with their powerful golems and ingenious plans.
* Sylvari - Not much is known of the sylvari, save that they are a race of sentient plant-beings, newly blossomed into the world. The sylvari are the youngest of the races, bound together by a common dream and awesome power.