world of warcraft is the only one i know of
To play any World of Warcraft you must select a realm and make your character.
Vanilla refers to the original World of Warcraft, without any expansions. It does NOT refer to Burning Crusade, Wrath of the Lich King, Cataclysm, or any of the Warcraft RTS games (Warcraft, 2,3).
No, there are no cheats available for World of Warcraft or any of its expansions.
Meez, world of warcraft, runescape, and on some of those websites there will be adds for more.
There are many forums available on the official World of Warcraft website. WoW also has many "fansites" that can be found on the official website: http://www.worldofwarcraft.com Here is another website: http://www.fanaticsofwow.webs.com
Reviews for the World of Warcraft MMORPG can be found from many different game review websites. The most extensive reviews can be found on MMOHut and MetaCritic.
As World of Warcraft is a highly popular MMORPG, some wallpaper and/or technology websites such as Brothersoft or Technorm do offer World of Warcraft-themed wallpapers. Many fansites that were created for the game do also offer such wallpapers for download.
World of Warcraft will work on any Macintosh or a PC. It doesn't matter the brand at all.
One can find videos of the World of Warcraft songs online on social video sharing websites such as YouTube. These videos are also available from Yahoo! Voices.
There are no cheats for World Of Warcraft and Blizzard Entertainment isn't planning on making any.
Runescape is somewhat like world of warcraft, though it is not a complex, it is free.