They are still operating. Fairly unsophisticated. The current "MO" is:
Unsolicited call with promise of funds. Then provision of the 03 phone number and a "File Number" to quote.

One calls that number and the arrangement is for a cheque payment to you via an Australian bank branch after you quote the branch a 6-digit pin code which will be provided to you, after you have transferred $170 "one-time registration fee" via international money transfer to: Harjit Singh Parmar, at an address in the suburb of Burari, Delhi, India. The 6-digit code to access your bank is supposed to come to you after that.

At which point I strongly encouraged them to cease their scamming ways.

got the same call. I called the guy a scammer and to stop calling.he replied i am going to keep going to call you. i hang up and soon after i got a call from this number (03) 8652 1447. saying his from some phone company.

Similar call from tax dept.

One woman called to call the (03) 8652 1042 for tax return.

Received a call from (03) 8652 1042 (female with Indian accent) advising she was from the Australian Grants Department and I had been one of 500 Australians successful in winning a $2600 grant quoting ref No. 177962. When ringing back to verify who they were, call diverted to messagebank and then advised messagebank full. This is clearly a scam and website confirms this, same as reference reported by Alfred below, as AGD do not cold call offering grants you have not applied for.

received 3 calls from (03) 8652 1042 from 'Kim' saying that they are from the Dept of Finance and that since I am reaching pension age, I need to call back to confirm my details or else i will not be paid my pension. They also gave a file number. When I called back from a private number, the message service said the mail box was full. Sounds like a scam.

I received a call from the "ATO" by a person named Joseph O'Connor stating that my name was selected from a survey and I was eligible for some $3,500 government grant. This call came from (03) 8652 1042

I recieved a call from the "ATO", person by the name of Felicia saying that because all my utility bills had been paid on time I would recieve a reinbursement of $2400. I just had to call (03) 8652 1042

ACCC Scamwatch
http://www.scamwatch.gov.au/content/index.phtml/itemId/801547

This is the Government media release about the latest Scam being run from this number.
http://www.infrastructure.gov.au/department/media/2010/d4_2010.aspx

Govenment grant scam,
The Australian Govenment will not call you offering you a grant of any kind.

Possible ATO scam