I took Robert's advice and bought the Scott Henderson instructional DVD called "Scott Henderson Jazz-Rock Mastery".

This is definitely the best instructional DVD I've ever seen. The DVD has two sections. The first section is basically an overview of the different chord types and how to solo over them using scales, arpeggios, and triads. He covers a lot of examples of substituting various scales and arpeggio ideas over the same chord type to bring out various chord tones in your lines.

The second part of the DVD is dedicated to phrasing. He has lots of tips for soloing through changes, and shows lots of examples of the various techniques to improve your phrasing.

This guy is a great instructor as well as a master player. This DVD is like getting a master class on improvisation from GIT. Great stuff, and highly reccomended for anyone needing a kick in the pants for ideas on soloing.

Here is a link to the DVD I bought:
http://www.amazon.com/Scott-Henderso.../dp/0739045067

-- Jim