Watch the C Minor Blues online guitar lesson by Mimi Fox from Jazz Anatomy
As in the Blues in Bb (major blues), the minor blues makes liberal use of the blues scales and pentatonic scale. Also be sure to learn your arpeggios! It's all about having your arpeggios down and at your fingertips. I cannot stress this enough. Again, I highly recommend augmenting this course with my Mel Bay Book: Guitar Arpeggio Studies on Jazz Standards (http://truefire.com/list.html?store=instruction_books&item=6770) OK, another shameless plug but I guarantee that your chops will thank you for it.