There are at least six bands with similar name: 1.NU (pronounced like 'noo'): Romanian psychedelic/ experimental collective, formed in 2001. On Last.fm it will be reffered to as NU(RO).
2.ÑU (pronounced like 'new'): Spanish prog band - late 70s.
4. NU; A danish band, which released their one and only album, AlphaBravoShockpopDisco (produced by Michael Patterson (Black Rebel Motorcycle Club, Beck)), in 2003. The band broke up in february 2004, but the lead singer (Stine Jacobsen) went solo still under the same name, NU.