Useful Sites

This is the main list and incorporates all URLs from the posts below so no need to scroll down

Official WoW European Site
QuestKeep - useful for quests
World Of Warcraft Database
World of War.net - everything you need to know about WoW
Thottbot - WoW database
WoW Cartography
Allakhazam - more WoW Resources
Goblin Workshop - Quest Guides etc
Another great WoW site
IGN wow site

Please respond to this thread and I will update the list on the first post. Please put them in the same format i.e. the url with a description of the site

Here are some more:

World of War.net - everything you need to know about WoW
Thottbot - WoW database
WoW Cartography
Allakhazam - more WoW Resources
Goblin Workshop - Quest Guides etc

Another great WoW site
IGN wow site

IGN WoW site already mentioned, but this is specific resource there - allows you to play around with talent tree setups for all the classes, save your setup and view other submissions.

Select your class, enter your level (and click out of the box to "enter" it), then spend talent points as you would in-game and get a summary of your abilities.

http://wowvault.ign.com/View.php?view=Talents.View

Kaldorei Worldmap including all the flight paths
Gamepressure Maps
Warcraft Tavern Tutorials