and many more that are worth a listen.  Gene, here's some more modern performers you should check out:

-Kate Rusby 

-Dolores Keane (her brother Sean is my fav Irish vocalist)

-June Tabor (Silly Sisters, w/ The Osterband and Solo)

-Mary Black

-Sinead Lohan

-Norma Waterson (Waterson/Carthy, solo)

-Eliza Carthy (Norma's her mum)

Happy hunting, try Google search first. Amazon is a good start for 30 sec.clips

Cheers, Kevin