Blues
Bob Pedigo, a true Blues lover, offers fifteen files. Mostly newer pieces and some
originals.
The Blues Midi Files
A good selection, includes both authentic blues and some "bluesy" music. Rather
heavy graphics.
Blues Midi Music from Victor James
Offers eighteen files, including one that is a "mystery" piece for you to
identify.
Blues Page, Jack's
"Midi Music"
About 70 selections, ranging from old standards to new originals.
Doc Doc's Blues Page
The largest collection, with about 345 files. These selections cover a wide range, from
old standards to modern blues and a few original compositions.
Menu Jazz pour MIDI: Blues
Part of a larger jazz site which is in French. Forty-seven nice files are offered here.
Midi and Jazz
This link takes you to the blues section. About 60 selections, some old standards and some
newer.
Sometimes I Get the
Blues
A great place to start exploring The Blues. The Zig Man, who maintains this page, calls it
"a small yet well produced collection of The Blues" and I quite agree.
The very best MIDI - Blues
A small number of "down home blues, piano style" tunes.
Elsewhere on About.com 
