The Wrath of the swiss replica watches Lich King Bestiary has been updated once more. In this update, we find a new race of humanoids called the Taunka. This is what is written about them.
This tenacious, stoic race knows all too well the rigors of living in the harsh and often deadly wastes of Northrend. Over time, the taunka - whom many believe to be ancestral cousins of the tauren - have adapted, but only by forcing the land and the elements to yield to their will. The taunka's relationship with nature, unlike that of their tauren brethren, has been one of constant struggle and grim perseverance.
Although the taunka may seem dour or even cold to outsiders, those who come to know them will soon recognize an embattled race of survivors characterized by colossal hearts and unshakable resolve.
So it seems like the Taunka could very well be the long lost ancestral tag huer knock offs tribe related to the Taurens we know. I forgot where I read it but I remember that the WoTLK expansion will explore more into the lore behind the Taurens so this very well could be it. I suspect that we'll see the same type of "connecting with the roots" that Thrall and his orcs had for the Mag'har orc tribe in Nagrand for the Burning Crusade expansion, only this time for the Tauren.
image taken from the WoTLK Beastiary, Worldofwarcraft.com