Hey guys, just wanted to post a short UESP.net article on the 'http://www.uesp.net/wiki/Lore:Thu%27um', outlining the lore of Thu'um. Note the bottom paragraph especially - sounds a lot like the 'Greybeards' at High Hrothgar, no? Or at least, that we may find some of these 'Tongues' among them (presumably the Greybeards can speak). Also, perhaps we will be able to learn some dragon shouts at Markarth Side?
A long practiced spiritual form of Nordic magic, also known as the Tongues, that is based on their worship of the Wind as a personification of Kynareth. Through the use of the Voice the power of a Nord can be formed into a thu'um, or shout - which has a large variety of applications (anything from sharpening blades to a long range weapon). Master Voices (known simply as Tongues) have legendary, and often unbelievable powers, including talking to people of hundreds of miles away or teleportation. The most powerful masters must even be careful whenever they speak, as their voice can cause great destruction and they are commonly gagged.
During the Conquest of Morrowind, the Nordic war chiefs were also Tongues (Derek the Tall, Jorg Helmborg, Hoag Merkiller). They needed no typical siege weapons when attacking a city as they merely used the Voice to break down the city gate and allow their armies to storm in. The future of the Tongues was forever changed by the most powerful Tongue, Jurgen Windcaller, also better known as the Calm. Jurgen converted to a pacifist and refused to use the Voice for any martial purposes. In a confrontation with 17 other tongues he reportedly swallowed the Shouts of the 17 for three days until they lay exhausted, later to become his followers.
Today, all Tongues live secluded lives on the highest peaks of Skyrim in tough conditions and contemplation, and have only spoken to announce the destiny of the great Tiber Septim (who later created an Imperial College of the Voice in Markarth, returning the Voice to the art of warfare).