If you are looking to listen to some new artists who are as of yet unsigned, there is a great site called Unsigned.com.
I was listening to some different Country Bands and I found one artist from Tennessee that I really like, Jayne Nelson. She has a sweet, pretty voice that kind of reminds me of some of the ballad-type singers from the late 80's.
I was also checking out some Jazz Artists, and I found a really great one named Brian Evans. I love his music - he has such a wonderful and soothing and seductive voice - I just love it!
I think I could spend all day on that site, listening to all kinds of different artists. I'm definitely bookmarking it.