Anyone who wants to download the 15GB ahead of time, here's a link to the old launcher, which will now delete your old beta (if you played in it) and redownload the new launcher + new client:
http://cloudfront.guildwars2.com/pVRS48PNCNhr0nlwfSIGf2jVkt4AhkjAVCp0IUp3ptvHlENECYbMWlJ49hwCn1J/Gw2.zip

turtsmcgurts wrote:

Anyone mind laying out the classes and their "roles"? ie AoE/healer/tank/single target/ect

Every class can do every role (Control/Support/Damage), they just have different mechanics.

Warrior: Has an adrenaline bar. Think super meter from a fighting game. When filled by doing damage he can do a super attack.
Thief: Stealth + stealing.
Mesmer: Illusions + you can do crazy things to those illusions.
Elementalist: Instead of 2 weapon sets, has 4 elements to swap between.
Guardian: Has 3 passive abilities that can be activated for a bonus at the loss of the passive. Has summoned weapons.
Necromancer: Minions and a special form bar which you can use to become stronger at the expense of a weaker bar upon being knocked out.
Ranger: Crazy pet system.
Engineer: He can equip kits and turrets which changes his gameplay. He has a Flamethrower kit that gives him an Airblast. Wonder where they got that from.

e:
a bit more in-depth, that doesn't mean every class does each role the same way though, ie here's a more support focused Warrior vs a more support focused Guardian

http://www.gw2tools.com/skills#w;aaaaa;aaaaaaaaaaaaaaa;WVYa;ZVfSY

vs

http://www.gw2tools.com/skills#g;aaaaa;aaaaaaaaaaaaaaa;cWYa;YVUQY