the name for different contemporary musicians who are developing a new kind of tango based on the classical tango, introducing new instruments, new sounds, new rhythms
(from tangotalks.com (http://www.tangotalks.com/Neotango_eng2.htm))
The "Neo Tangos" that the aforementioned groups have produced are hybrids of traditional instrumentation and electronic sound, artistically bridging the gap between the Golden Age and the new millenium. This hybrid tango music strikes a chord with mass audiences, and its vibration has the potential to generate not only small gatherings of aficionados, but an international social and artistic movement.
(from neotango.com (http://www.neotango.com/ar-neotango.html))
This has been branded 'Tango Nuevo'(although Piazzolla was called that in the 70s) or 'Neo-tango', or 'tango fusion'. Popularised by the highly popular Gotan Project based in Paris, a raft of new compositions and sounds is being heard not only by tango enthusiasts, but by 'dancemusic' and mainstream TV-advert-watching audiences. This type of music often makes up a considerable part of the music played for dancing in milongas. Other artists include Bajofondo Tango Club, Daniel Melingo and Carlos Libedinski (Narcotango). However some contemporary musicans are following other musical paths closer to tango's traditional sound, including groups such as Pablo Aslan's Avantango and El Arranque.
(from edinburghtango.org.uk (http://www.edinburghtango.org.uk/tango/index.php?type=page&val=Historyoftango&doctype=txt))