Experts slaved for hours, chained to monkeys, to bring you this information.

With the announcement of the second World of Warcraft expansion at
BlizzCon in August, players have been clamoring for more information
about Northrend. While some details were made available at BlizzCon,
much was not. We obtained pieces of information though by looking
back at Warcraft 3: The Frozen Throne and at various pieces of Warcraft
lore.

Borean Tundra - This will be one of the two possible starting zones in
Northrend. It is located on the south west edge of Northrend and is home
of the Turskarr (a humanoid walrus race). The ongoing quest chains in
this zone are said to focus on the conflict between the Tuskarr and the
Nagas in the zone.

Read more at the Ten Ton Hammer WoW site.