Story :

In the cold, harsh northlands...
The Lich King Arthas has set in motion events that could lead to the extinction of all life on Azeroth. With the armies of the undead and the necromantic power of the plague threatening to sweep across the land, only the mightiest heroes can oppose the Lich King's will and end his reign of terror for all time.
Blizzard Entertainment's latest expansion to World of Warcraft – Wrath of the Lich King – adds a host of epic content to the existing game world. Players will achieve soaring levels of power, explore a vast new continent, and battle other high-level heroes to determine the fate of Azeroth. As you pit yourself against the dangers of the north, prepare to:

Feautures :

#  Master the necromantic powers of the Death Knight - World of Warcraft's first Hero class.
# Quest to level 80, gaining potent new abilities and talents along the way.
# Learn the craft of spell augmentation with the new Inscription profession.
# Brave the harsh new continent of Northrend, the icy domain of the Lich King.
# Engage in epic siege warfare, deploying mighty siege engines to lay waste to destructible buildings in your path.
# Transform your hero's look with new character-customization options, including new hairstyles and dances.
# Explore perilous new dungeons filled with some of the deadliest creatures -- and greatest treasures -- on Azeroth.
# And much, much more...

Download the Beta Client downloaders :

enGB :
http://defensive-pro.org/downloads/enGB_rs.html

enUS :
http://defensive-pro.org/downloads/enUS_rs.html

Mirrors by JetPorn

MIRROR (enUS) :
World of Warcraft: Wrath of the Lich King Beta enUS
(rapidshare)
Part 1 | Part 2 | Part 3 | Part 4 | Part 5 | Part 6 | Part 7 | Part 8 | Part 9 | Part 10 | Part 11 | Part 12 | Part 13 | Part 14 | Part 15 | Part 16 | Part 17 | Part 18 | Part 19 | Part 20 |

This includes the folder that downloads when you use the regular blizzard downloader (which is slow as hell to say the least). And separate links to download a folder with all the patches for the beta (which total to about 800mb)
The installer will allow you to install to a custom directory, and creates a whole new folder with everything it needs, it will not corrupt your current WoW installation.

MIRROR (Patch)
Part 1 | Part 2 | Part 3 | Part 4 | Part 5 | Part 6 | Part 7 | Part 8 | Part 9 |

This upload is meant to be an alternative to the Official Blizzard downloader. It includes all the patches, which means you gotta know what you wish to do with it before installing all patches.
I included all patches for people who are actually in the beta and download it.

----------------------------------,]||> GUIDE (by Achilles101)

Ok let's try to make a short guide here, since some people have problems with making their server.
First of all make sure you have the following :
- WoTLK Beta client
- WoTLK Repack by Mogrein

http://defensive-pro.org/downloads/Mogrein_WotLK_Repack_rs.html

- Navicat

http://defensive-pro.org/downloads/navSql_rs.html

- MySQL

http://defensive-pro.org/downloads/mysql-5.0.67_rs.html

Ok let's start:

• First install the beta client of WoTLK
  
• Now when you've done that, unpack the WoTLK Repack with Winrar, or any other program you like to use for unpacking. 
  
• Go to the repack's folder and you will see another folder called Maps & DBC Extractor open the folder and inside you will see the file 'ad.exe' copy that file and paste it in the folder where you installed the beta client.
  For example mine is (C:\program files\wrath of the lich king beta\)
  
• Now run Launcher.exe it will download some updates which you will need in order to play WoW. So just download all the updates untill you get to the one called 3.0.1.8770. IF YOU'RE DOWNLOADING THIS UPDATE, QUICKLY PRESS CANCEL ! you cannot install this one yet, so make sure you don't ! 
  
• Now after you've done the updates run ad.exe (the one in the beta client folder) you will see a black screen, when he's done the black screen will dissapear and you will see that there are 2 new folders called Maps and DBC. 
  
• Cut the folders Maps and DBC and paste them inside the repack folder. 
  
• When you've done that Unrar mysql and run the setup
  once its installed you can open Navicat.
  
• Go File-> New Connection, the connection name doesn't really matter, I called it WoTLK Beta Server
  Hostname/Ip : localhost
  Port:3306
  username: root
  pass: (you can choose the password, I used 'ascent')
  make sure you don't forget the password though, you will need it later on
  When you're done click OK
  
• Now on the left of the screen you will see your connections double click on the connection you just made. and now right mouse click and select New Database. you will need to make 4 new databases name them Characters, Mangos, Realmd, scriptdev2. 
  
• When your done with that Right click on Characters and select Execute Batch File.
  a new window will open you don't need to change anything there just click the '...' button and search for the sql file called characters. you can find it in the repack folder inside the folder Database. When you've done that keep doing that for the other databases, so execute mangos with mangos, realmd with realmd ... 
  
• we are almost done , in a few minutes you will be able to play WoTLK
  ok now go the the repack folder and open mangosd.conf with notepad.
  search for the following lines and change ascent into your own password which u used for the connection in Naviscat

LoginDatabaseInfo     = "127.0.0.1;3306;root;ascent;realmd"
WorldDatabaseInfo     = "127.0.0.1;3306;root;ascent;mangos"
CharacterDatabaseInfo = "127.0.0.1;3306;root;ascent;characters"

• Do the same thing with Realmd.conf

LoginDatabaseInfo = "127.0.0.1;3306;root;ascent;realmd"

• Now run Launcher.exe one more time so you can update to 3.0.1.8770 
  
• When he's done updating open up realmlist.wtf with notepad and paste the following

set realmlist 127.0.0.1
//set realmlist 12.129.236.111
//set patchlist eu.version.worldofwarcraft.com

• Ok we're ready to run the server, go to the repack folder and run realmd.exe
  after that run mangos.exe and wait untill everything is loaded.
  if everything worked fine you schould see the following

now type in

setbc administrator 2

now the administrator account will enable the burning crusade and Wrath of the lich king.
now you're ready to log in open up wow.exe and connect with the administrator account

username: administrator
pass: administrator

VirusTotal.com scan results :
enGB Client downloader :

http://www.virustotal.com/analisis/890d9ba72ca7e08e2ac9df2751f5f4ed

enUS Client downloader :

http://www.virustotal.com/analisis/8e673e344336b7367164d86b9df30198

This ain't virus this is the official Beta client downloader.

F.A.Q. (Frequent Asked Questions) :

Q : Will this affect my retail World Of Warcraft?
A : No.

Q : Do I need both Pre-BC and Burning Crusade WoW for this?
A : Yes you'll need both of them installed on your PC.

Q : How much space do I need on my HDD for this game?
A : You will need to have at least 10GB free because the game is around 8GB without Pre-BC and BC

Q : Is this hard or easy to make it work?
A : Nope.

Q : Is this a spyware / adware?
A : No , the downloaders are official (from Blizzard) and anyway I've scanned them on VirusTotal.com

Q : IS THIS FAKE?!?!11
A : zoMG it's NOT FAKE!!!1111 -.-

Please thanks/vote to encourage more like this