Don't know anything about Tom House.
Joseph Spence was a Bahamian guitarist and stonemason who was discovered by blues
ethnomusicologist Samuel Charters in 1958. His syncopated fingerpicking style was a
big influence on Ry Cooder among others. There are several CDs of his music currently
available; I own "The Complete Folkways Recordings, 1958" which was distributed by
Rounder Records. It's great stuff.
http://www.si.edu/folkways/40066.htm has a RealAudio clip of his music;
http://www.indiana.edu/~smithcj/cjsbvoi2.html is an appreciation of his life and work.
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Brad's Page of Steel:
http://www.well.com/user/wellvis/steel.html
A web site devoted to acoustic and electric lap steel guitars