You are fine to travel to the US on a B1/B2 visa, as the Australian US embassy's website explains:
Q: What is a business related (B-1) visitor visa?
A: Generally, the travel appropriate for a business (B-1) visitor visa
includes travel to:
- Consult with business associates;
- Attend a scientific, educational,
professional or business convention, or a conference on specific
- Settle an estate;
- Negotiate a contract;
- Participate in
Q: What is a visitor related (B-2) visa?
A: Generally, the travel appropriate for a visitor (B-2) visitor visa
includes travel for:
- Tourism or Family Visits
- Medical Reasons (see below for further
- Participation in Social Events
- Armed Forces Dependents
- Dependents of Crewmen
- Short Course of Study
- Amateur Entertainers and
Depending on what you intend as the primary reason for your visit, you would fall under either the B1 (consult with business associates) or B2 (tourism or family visits) category. Having visited the US for both reasons on various occasions as an Australian working for an American company, I've had no issues.
One caveat is that some immigration officers view a distinction between being there on "business" versus being there for "work" - the latter being potentially a violation of a B1/B2 visa as it does not cover seeking employment in the US.