I've just discovered these ladies with a jazzy laid-back style. they may not fall into exactly the same jazz category, but I've listed them as good chill-out tunes. BTW I downloaded all their albums using a Nokia-comes-with music phone contract voucher. Using Nokia's Ovi 'similar artist' finder I've found some real gems. Converted to WAV files the sound is good. Some you will know, feel free to add similar artists to the list:
STACEY KENT
NORAH JONES
NATALIE COLE
JAIMEE ALLEN
CLARA TEAL
ANGELA HAGENBACH
DIANA KRALL
ELIANE ELIAS
HALIE LOREN
ESPERANZA SPALDING
KELLY MITTLETON
MADELEINE PEYROUX
NIKKI YANOVSKY
NINA SIMONE
RACHELLE FERREL
SARA BAREILLES
SARAH GARAZEK
TRINTJIE OOSTERHUIS
Ooops, almost forgot
MICHEAL BOLTON ;D
STACEY KENT
NORAH JONES
NATALIE COLE
JAIMEE ALLEN
CLARA TEAL
ANGELA HAGENBACH
DIANA KRALL
ELIANE ELIAS
HALIE LOREN
ESPERANZA SPALDING
KELLY MITTLETON
MADELEINE PEYROUX
NIKKI YANOVSKY
NINA SIMONE
RACHELLE FERREL
SARA BAREILLES
SARAH GARAZEK
TRINTJIE OOSTERHUIS
Ooops, almost forgot
MICHEAL BOLTON ;D