I saw this great bit and thought I'd share it with you. Gentleman's name is David Cain, talented guy... He spins a plate held in his mouth, while spinning two balls on his finger - one on top of the other! - and spinning a juggling ring on that arm at the elbow, while juggling two more rings in his left hand. Definately worth a watch, the overall effect is very impressive.
YouTube - David Cain Juggling Combination Trick
you might also check out:
YouTube - 61 Types Of Juggling