I haven't tried it, but I have a DVD by Mike Mahler called "Mike Mahler's Aggresive Strength: Kettlebell Solution for Size and Strength" that is a 90-miute tutorial on kettlebell technique. (I got it-- from
www.veganessentials.com --because he's a vegan strength-training coach and I wanted to see his perspective and give him some financial support).
While I don't do kettlebell work, or intend to, really, and have only watched the first 30 minutes of the tutorial, there's lots of useful info in it, that he has gleaned from his experience, as well as from other strength training coaches, and the man who invented(?) kettlebell training (and whom he trained under), Pavel Tsatsouline.
Some things, like inhaling on the positive lifting phase of a lat row or upright row, go against the conventional recommendation to exhale on exertion, but I've found they work well, and are what I instinctively want to do anyway: the air in the lungs supports the chest and the shoulder girdle, and I find it helps keep my shoulders stable.
He also stresses grounding your feet and legs with every move, which I've found adds more stability and strength to my moves.
Med balls with handles look good but can you use them between your knees?? I haven't tried this but have thought about it.