It's true that the official website is seldom up to date. According to the volunteer mailing I received featured performers this year include:

Martin Hugill
Finest Kind (US)
Bob Webb
Jeff Davis
Jerry Epstein
Serre Le Coute (Quebec)
Ianucci Family (Italy)
Bruce Molsky
Songhai People (Niger)
Celeste Bernardo
Peter Kasin and Richard Adrianowicz
And others

The dates are June 10 to 12

For more information try the website at www.mysticseaport.org or call 888-973-2767

I'm sure someone else can provide more detail

I certainly plan to be there early and late.

Cheerily,
Charley Noble