I've been fascinated about the song since I realized a few years back that there were so many versions that have been recorded. Here is what I've found so far:

Year        Artist/Group        Format
        versions I have:        
1929        Wilmer Watts & Lonely Eagles        CD
1937        Blind Jesse Harris        CD
1947        Lead Belly        CD (acapella)
1947        Lead Belly        CD (with twelve string)
1959        Dave Van Ronk        cassette/CD
1963        Tom Rush        CD/LP
1963        Koerner, Ray & Glover        CD
1963        Dave Guard & Whiskeyhill Singers        CD
1963        Judy Henske        CD
1964        Hoyt Axton        CD
1972        New Riders of the Purple Sage        CD/LP
1991        Harvey Reid        CD
1993        Johnson Mtn. Boys        CD
1993        Morrissey/Brown        CD
1997        Geoff Bartley        CD
1997        Bob Dylan        CD
1998        Ken Hamm        CD
1999        Chris Smither        CD
1999        Gordon Bok        CD
2001        Steven Senderoff        CD
2001        Dirty Birds Jug Band        CD
2001        Kate Seeger & Dean Spencer        CD
2002        Joel Mabus        CD
                
        versions I don't have:        
50s        Fred Gerlach        Easy Rider
70s        Tompall Glaser        CD "Outlaw"
50s        Paul Clayton        
30s        Odum & Johnson        
?        Paul Campbell        
2001        Martin Carthy        CD Box
2001        Paul Arnoldi        CD
?        Alan Lomax & the Duprees        
30s        Will Starks        
1976        Tom Akstens        LP
200?        Elijah Wald        CD
?        Wollies        45 rpm single
?        Mark Crawford        in production
2000        David & Roselyn        CD
1989        Volo Bogtrotters        ?
?        Louisiana Grass        LP?CD?
1966        Terry Burnett        
1999        Dillof, Rice & the Cuyahogians        
2001        Jack Norton        
195?        Win Stracke        LP Americana
                
        Book References:        
1927        Geraldine Smith        Sandberg book
1927        R.W. Gordon        Sandberg book
?        Paul Oliver        book?
1964        Native American Balladry        
                
        Live Performances:        
1970        James Taylor        
2002        Zen Tricksters        Dead cover band
?        David Nelson Band        DN from NRPS
2000        Paul Brady        
2002        Railroad Earth        
2000        Gene & Nancy Morgan        
                
        unconfirmed links:        
?        Bob Franke        
?        Michael Cooney        
?        Jonny Lang        
?        Seldom Scene        Live performance?
?        Blind Willie McTell        
?        Radiators        Live performance?
?        Quicksilver Messenger Service        Live performance?
?        LED39        CD?