These are the talent trees as seen on BlizzCon 2011.

Keep in mind that everything is completely new compared that you are used to and all of this is NOT set in stone.
Blizzard also promised a demo talent tree calculator on the official website... soon.

Here are a few more things about the talents in 5.0:

• Junk talents were removed and more junk should be removed in the future.
• The new talents should allow more choices and customization.
• The abilities will work like this:
  
  • You'll have Class abilities. Everyone will get those.
  • Spec abilities, and you are getting those if you pick a spec or another.
  • Talent abilities. These are given by the talents you pick.
• And again, none of these are set in stone.

You'll get to choose one out of three talents every 15 levels. here is how the trees look like:

Death Knight


Druid


Hunter


Mage


Paladin


Priest


Rogue


Shaman


Warlock


Warrior


The MONK is not here. Maybe somewhere in the future.
What do you guys think about these talents?