No. Brisbane is north of Sydney
Sydney, Melbourne, and Brisbane are in the continent (and nation) of Australia.
The half way point when driving from Brisbane to Sydney, Brisbane is Armidale, Australia.
Melbourne is closer to Sydney than Brisbane is.
Melbourne is closer to Adelaide than Sydney is.
Brisbane is closer to Cairns.
It is 921 km by road between Brisbane and Sydney. Air distance is 728 km.
Sydney-Melbourne-Adelaide-Perth-Brisbane-Hobart
From Sydney to Brisbane via Armidale is a distance of 969 km. Travel time is around 14 hours, without breaks.
Numerous cities lie between Sydney and Brisbane. They include the Gold Coast, Newcastle, Coffs Harbour, Ballina and Port Macquarie.
People have cycled between Sydney and Brisbane but they share narrow roads with heavy traffic. Recently (early 2009), a teenager with Asperger's managed to cycle from Brisbane to Sydney, arriving safely at his destination.
No, there is no U.S. Consulate in Brisbane. The nearest U.S. diplomatic mission is located in Sydney, which serves as the U.S. Consulate General for that region. For U.S. citizens in Brisbane, services are typically accessed through the Sydney consulate.