Jimi Hendrix is one of those artists whose posthumous releases far outnumber those released during his lifetime. And there’s more on the way: People, Hell and Angels is scheduled for a March 2013 release. According to Rolling Stone, the sound is an experimental one:

Hendrix toys with horns, keyboards, percussion and a second guitar, exploring fresh diversions from his legendary guitar work.
Read more and take a look at the cover art at RS.