Testers can now select up to three characters to prelevel to 80 on beta servers.
World of Warcraft: Wrath of the Lich King's beta test adds premade characters so that U.S. beta testers of its impending expansion now have the option to copy premade characters to the test realms, reported by 1UP.com.
The details are as below:

U.S. beta testers of the impending World of Warcraft: Wrath of the Lich King expansion now have the option to copy premade characters to the test realms. Players can choose up to three of these characters, which start out at level 80 and come equipped with rudimentary PVP gear.
Blizzard has yet to make any official statements about these preleveled avatars, but their gear and naming scheme implies that the company is ramping up testing on PVP at the new level cap. Lake Wintergrasp -- World of Warcraft's first dedicated PVP zone -- has been singled out as the subject of criticism from scads of testers, so there's a good chance this is the first step toward fine-tuning that experience.
Read More Here.
Resource: 1UP.com
Related Stories: Blizzard Entertainment Soundtracks Now On Sale
WoW: Wrath of the Lich King Preview
Hellgate's Failure and AoC's Success
Blizzard: WOW Success is Exhausting
Mythic's Jacobs: WoW Killer Only 100 Million USD