I see from the original dates that this is an old thread recently resurrected, but I noticed the suggestions to view Dirk Losander's z-ball routine , which is a great routine. However the old links posted no longer work, so I want to point out that the Losander zombie ball routine can now be viewed here :
Losander "Animated Sphere" floating trick (based on ideas from Tommy Wonder) can be seen here:
The "Animated Sphere" looks more like a basketball or something , although I hear he also makes a special version of it as Pumpkin which would be a perfect themed trick for Halloween shows, probably other times of the year , too. (but especially Halloween) .
There's also a portion of Timothy Drake's excellent floating ball routine posted on his website (not the full routine, but you can get the idea) --
Timothy Drake Floating Ball illusion
These are examples of what the z-ball floating is supposed to look like
for anyone who is trying to learn it.