It seems that Call of Duty: Black Ops has been released on Steam in Australia. I don't know if this is true, since i don't live in Australia, but it seems legit, since steam releases it at 12:00 AM, November 9th for the timezone you live in. So, look at your clock, and start counting until midnight, or If you pre-ordered Black Ops with steam, and have pre-loaded it, go play now!
Be aware that there might be some conflicts between some countdowns: Your own clock might say its 5 hours until midnight and that means 5 hours until release, but then the countdown on the main page of this wiki might say 6 hours and the steam countdown might say 13 hours. All releases are at midnight, no matter what. The main page is using GMT, and the steam clock uses PST. That causes the conflicts between times. But it's still your own timezone at midnight. Count in your own timezone, and wait for the big moment!