Remember when we were talking on MSN, and I said your cat jumps looked funny? Just to elaborate on that, the reason they are not smooth is because you slow down coming up to the obstacle, place your hands on it, and then jump.
Maintain your speed, and jump before your hands contact the obstacle. This will not only make the movement smoother, but also increase your distance a lot.
Also, remember about the wallspins. Never reach down.