Kronos Quartet’s arrangement of Sigur Rós’ "Flugufrelsarinn" will be digitally released by Nonesuch on Sept. 4, so says Billboard. Kronos has played "Flugufrelsarinn" as an encore at its concerts for a number of years, and it was available on the ensemble’s Myspace page for while.
The quartet is also releasing an arrangement of "The Star-Spangled Banner", also based on the Jimi Hendrix rendition. "Purple Haze" has been a long staple in Kronos’ repertoire.
I’m looking forward to these releases, despite the likelihood they’ll be crippled by DRM. Nonesuch is part of the Warner Music Group, which has been historically gung-ho about DRM.