Not sure if you've checked out these two DVD's but Xande Ribeiro's Instructional DVD is great. The guard passing section alone is worth the price of the DVD. Xande spends time showing the great insights that make positions and techniques work, without wasting time with useless repetitions.
Another great new DVD is Caio Terra's 101 Half-Guard Techniques. as the name clearly states World and Pan Champion Caio goes through loads of aspects of a part of the game he dominates . . .the half-guard. While i knew that Caio is a great competitor what I didn't know was how good he is as an instructor. Caio much like Xande, points out technical details that are super important for techniques to work while others fail.
These have helped me with my game, I hope they help yours should you decide to check them out. Let me know what you think!
Now go train Jiu-Jitsu,