It is an opportunity to exchange ideas, this is why this event is not called a festival but a 'laboratory'.
Last year's teachers were Gaston & Mariela, Sigrid & Mazen and Daniel & Anna. Their performances are on YouTube ( http://fr.youtube.com/user/tangodj).
To get an impression of the event you can visit the last year's website.
More information for 2008 have published on http://www.tangolab.ru.
For foreign dancers this is an opportunity to meet Moscow and St.Petersbourg's best tango dancers, visit the city and enjoy Russian hospitality. Moscow has a young and vibrant tango scene, with milongas on any evening of the week and the city frequently visited by the most renown maestro's. You will be hosted in dancers' homes and helped with obtaining visas. There are several lowcost airlines serving Moscow from different locations.
If you are interested in participating, write to Maria Kolesnikova who speaks English and Spanish, she will help you to organize your stay.