For all u guys who wonder how to do it without switching hands;
(Imagine we're dribbling left)
1. Take a dribble while putting your opposite foot in front of you.
2. Now put the ball behind your back as if u were gonna do a behind the back pass and spin on your front foot.
3. At the end of the spin, flick the ball down with your wrist and take your dribble.
4. Continue on while protecting the ball with your other hand.
Watch Jamaal Tinsley a lot, it's his favorite dribble:
http://www.youtube.com/watch?v=hzp9hMM030g
Hope that helped.