Throwing in my 2 cents...
After some lengthy reading and research, I suspect the page was never suppose to be public. It looks like the website has maybe had a refresh and they found the open portal and closed it. That is supposition since I have not seen what the page looked like prior to you guys mentioning it not working.
This link is to a paper that was submitted 2 years ago and page 29 explains what the missing page was suppose to do.
http://www.virtuallab.bom.gov.au/fil...ts_-_FINAL.pdf
The new webpage clearly stipulates that the information in the projects is only for authorised representatives of either the CSIRO or Government. The Project "ACCESS" seems to be the parent of the satellite images.
I also suspect that the new satellite viewer on the BOM site is a derivative of this project - without the forecast capability?