Ha ha well it's not all that hard... Throwing things up is easy. Catching them is the hard part, and that's what's holding me back.
I think that most 5 ball jugglers (100+ catches) should be able to start trying 9 ball. 7 club is a b*tch though, not enough hand space.
Although i have an idea for 9... Hoping to get a session in on monday, and will be taping it and posting good bits. For the moment, only my attempt at 7 clubs is up: http://www.youtube.com/watch?v=bj7ORlQ8y04
Also a poor 10 ball attempt And some 10 club passing