MathTutorDVD.com has posted two additional lessons in the
differential equations course that is currently in development.

Lesson 7 – Existence and Uniqueness Theorem
Lesson 8 – Graphing Solutions of ODEs

I will release Vol 1 of the Differential Equations tutor in about
a month that will be around 9 hours in duration and will
cover the solution techniques and applications of first
order differential equations.  Vol 2 will cover second order
and higher differential equations and applications!