Willy Mason has been confirmed for all of the North American dates. I was a big fan of this singer-songwriter from Martha's Vineyard when he first started out. I saw him at ACL in '07 when he was about 20 and it was a really good performance just solo acoustic with a couple of songs accompanied by his mother, folk singer Jemima James. He has gained some fame in Europe and opened for M&S on their tour across the pond before. He was playing a very limited number of US shows this year with a talented backing band judging from the footage I've seen online. Now I know there will be a few more. I may have to look into making one of these.
I've got a setlist of one of his opening act shows for the Felice Brothers. I like Willy a lot. Wish he was more konwn.