Scoundrel:
[url=http://www.swtor.com/info/holonet/classes/adv_gunslinger][/url]
The Scoundrel doesn't have time for politeness or a fair fight.
In addition to his trusty blaster the Scoundrel packs a stealth belt, a
scattergun and a med pack--everything he needs to get in, knock the
enemy for a loop and get out alive. Being invisible works best, but even
when Sith fly through the air waving Lightsabers all they get to do is look surprised as the Scoundrel's scattergun sends them back the way they came. The Scoundrel always shoots first.
That's the main description posted. Basically a bit of everything. Which is one of the specializations for the smuggler. So I assume it's all based on how many skill points or unlocks an individual has while playing the class. Which is why I suggested cooldowns, if they were to lock certain traits/skills because you had another then I doubt smuggler would go very far in the game.
Smuggler/scoundrel will be a pretty well-rounded class from what I have read/seen. Which will make it a worthy PvP class. But because of that, I imagine their dps, off heals, stealth won't be as great as one would imagine since they will have all of those abilities wrapped in one.
Of course, I could always be completely wrong.