TUAW posted the following hands on experience:
In cursory testing (by yours truly), it does appear the update improves player control. As promised, the "dead zone" where the ball stops moving altogether is larger, and movement overall has become less erratic. I noticed that when trying to slow down, the monkey ball is less likely to turn around, which makes it easier to navigate tight corners and control speed.
Also included is an interactive tutorial and instructions. Notably, game play is now suspended when you press the "Home" button.
Super Monkey Ball 1.0.1 is a free update for existing users and $9.99 for new users.
Read More [via TUAW]