I know what you are going through, believe me... What helped me in the next progression of learnig was again, learn all the positions of the pentatonic scales in all keys. But what really helped me out was renting a instructional video that featured Larry Carlton's playing and techniques. Learn how to bend those strings brother.... There are several techniques that he covers for bending and virbrato. This made my sound and lead playing that much more interesting. Another exercise with pentatonic scales is the call and response drills. You create a riff and try to respond with another riff that closely resembles it. It's like have a guitar dual / cutting heads with yourself. I don't know if they still have that Larry Carlton video in circulation, but if you find it, get it.

Riffmaster