ROFL Taz!
I excersice with my fitball and a set of 2 kilo dumbells.
Start out gently and sit on the ball for balance. You can do your pelvic squeezes while you are excercising your arms.
You can do some bicep and tricep curls and punches while sitting on the ball. You can also push the weights up in the air kind of like a bench press while laying on the floor.
Start with small repititions. Aim for 5 then increase as you get stronger. No need to make yourself sore by trying to do too much too soon, and don't forget to stretch after!
Also you can do your bicep curls while you lean on the ball against the wall and do squats at the same time (that way you can get your workout over quicker and get back to your maltesers )