Just use generic optus GPRS Settings. they will work.
OH your account needs GPRS/Internet Data setup too
P.S. I just got my o2 Graphite 3g windows mobile 5.0 phone, dam vodafone 3g, cant make video calls, but can recieve them. "Oh update your software" Its been on the market for 2 weeks THERE IS NO NEW SOFTWARE.
Douchebags. Ohwell, vodafone will shut up shop soon just watch!