NEW YORK (Reuters) - Icelandic band Sigur Ros, who have been admired by the likes of Radiohead and Coldplay, will release their first album in four years on May 29, marking the end of the band's indefinite hiatus, the band announced on Monday. The band's sixth album, "Valtari," is comprised of eight songs, runs 54 minutes and will be released on double LP, CD and digital download formats. The band initially put the album on hold while lead vocalist Jonsi Birgisson recorded and toured a solo album. ...