I guess it depends on what your definition of "folk" is -- to some, it's just traditional folk, but to others it can include the urban folk or singer/songwriter genres.

Here are some of my current favorites:

John Gorka
Martin Sexton
Brooks Williams
Jeffrey Foccault
Christopher Jak
Carrie Newcomer
Cheryl Wheeler
Jeff Black
Nickel Creek
The Greencards
Old Blind Dogs
Beth Nielson Chapman
The Bacon Brothers
The Be Good Tonyas
Gillian Welch
Jackopierce
Ellis Paul
Pierce Pettis
Nicole McKenna
Dar Williams
Sufjan Stevens
Richard Shindell
Neko Case
Patti Griffin
Steve Earle
Peter Case

At the blues end of folk you have great traditional artists like,

Mississipi John Hurt
Lightnin Slim Hopkins

and some fantastic contempory artists like,

Chris Smither
Harry Manx
Eric Bibb

and more along the lines of classic folk is Boo Hewerdine.

Regards, Anthony

Victoria Williams (http://www.creekdipper.com/biopage.htm)