Roots music: what in the world next?

Good news and sad news for roots music. Good news for the traditional Cornish band from Port Isaac, Fisherman's Friend , whose repertoire of folk songs and sea shanties has just landed the group a £1m recording contract. Sad news that radio DJ and author Charlie Gillett has died aged 68. He was a pioneer who championed and helped to popularise many of what have become the big names of world music, from Youssou N'Dour (from Senegal) and Salif Keita (of Mali), to Mariza, the Portuguese fado artist. Folk and traditional forms of music have been through various revivals, through all sorts of "roots" and "alt" reinventions, and now seem as established as global genres as they are firmly embedded in their local cultural ecologies. Still, Cornish sea shanties are a new turn in this ever-expanding market. What kind of world, folk or roots music do you like? And what can you recommend that has thus far gone undiscovered by the A&R guys?