The Piano blues reference article from the English Wikipedia on 24-Apr-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Piano blues

For thoughtful child sponsors
Piano blues refers to a variety of blues styles, sharing only the characteristic that they use the piano as the primary musical instrument. Ragtime and boogie woogie are the best known kinds of piano blues, though barrelhouse, swing, R&B, rock and roll and jazz are strongly influenced by early pianists who played the blues.

Blues | Blues genres
Classic female blues - Country blues - Delta blues - Jazz blues - Jump blues - Piano blues
Blues-rock - Soul blues
African blues - British blues - Chicago blues - Detroit blues - Kansas City blues - Louisiana blues - Memphis blues - Piedmont blues - St. Louis blues - Swamp blues - Texas blues - West Coast blues
Musicians
Styles of American folk music
Appalachian | Blues (Ragtime) | Cajun and Creole (Zydeco) | Country (Honky tonk and Bluegrass) | Jazz | Native American | Spiritualss and Gospel | Tejano