Cowboy Junkies, great Canadian band
Saw them about 4 years ago here in metro Detroit. Incredible band. Her voice is beautiful. Very acoustical.
Aimee Mann. She has been around in some way for years. I hope she continues on for years more. I liked her solo stuff on the Magnolia soundtrack.
The one I wanted to add. Happy Rhodes. I discovered her by accident at Borders about 8 years ago. Her voice is just so awesome. Another one I discovered recently that I really, really love: Nathan. They do a rendition of My Favorite Things that even my husband loved. I downloaded a bunch of their stuff off of Aol. And also.... Joni Mitchell. I know she isn't necessarily completely unknown, but mostly people tend to think of her in terms of her 60's woodstock stuff. Over the years she completely evolved and has become one of my favorite singers. Oh yeah, one more... Ginger.
peace and blessings
BlackSwan