my winamp playlist kicked in with the next song up in the list: Steve Martin - Pretty Flowers
from his album "The Crow - New Songs for the 5 string Banjo"
Guest vocals by Dolly Parton and Vince Gill.
http://www.youtube.com/watch?v=bj6EJ9lOlWw&feature=related(Yes, THAT Steve Martin. He is a terrific banjo picker.)
From 2009 - it's pretty modern but I don't know if this is an old song or not. Pretty great bluegrass if you ask me though.
But yeah, I love old country and new country that sounds like this. Other modern country acts I like: Those Poor Bastards, .357 String Band, Unknown Hinson (you may know him also as the voice of Early Cuyler on Squidbillies), and I like all three Hanks though Sr and III are much better than goofy Jr.
I loooooooooove old stuff like the previously mentioned George Jones and Johnny Cash and Patsy Cline and Merle Haggard and Willie and Waylon. I also love Bob Wills and the Louvin Brothers and Bill Monroe. Don WIlliams, Don Gibson a Flatt and Scruggs.
I believe there are artists out there holding true to that type of roots music but you probably won't hear them on commercial radio.
There is a thing called gangstagrass which combines hip hop and bluegrass that I dig - the theme from Justified is an example.
http://www.youtube.com/watch?v=q__bIJUWZv4edit becasue I wanted to add that I know it's great fun to bag on modern pop country because, well yeah, it pretty much sucks...but I have to also keep in mind that back in the day, Hank Sr and Johnny and Willie were the modern pop country. The difference is they were there from the start (pretty much) and learned from people who were definitely there at the beginning of country so they have closer to the roots influences. Some of these new guys are in it just for the money and that makes shit music. Same can be said for rap and rock too though.
edit again because Those Poor Bastards deserve a listen:
http://www.youtube.com/watch?v=dsogItZ2nfU&feature=related