Some musicians, clubs, and vendors of interest:
 

Red Hot Jazz Archive -- includes photos and stories of early jazz musicians and bands
A Great Day in Harlem -- a classic photo that featured the greatest jazz players of its day
Metropolitan Uke Association -- there's more uke players around than you'd think...
Glyph Ukuleles -- MR heartily endorses!  re-defining quality, hand-made ukes.
Ukulele Hall of Fame -- everything you need to know about it, maybe more
Asylum Street Spankers-- one of our favorite bands, based in Austin, Texas
Shorty Long -- another Austin band featuring ukuleles of all sizes
Hot Club of Cowtown -- playing hot jazz and Western swing
Hokum Jazz -- local purveyors of early blues and jazz
Esther Haynes -- chanteuse extraordinaire
Action Guitars -- choice source of instruments, supplies, and repairs
Barbara's Guitars -- great vintage instrument dealer
Venerable Music -- excellent sourse for hard-to-find vintage CDs
Hepcat -- another source for early jazz
Old Hat Records -- specializing in early novelty songs
Yazoo Records -- excellent compilations of early American music