Hi aussies with Optus - well I just rang them and after having to wait ages in a queue finally got through to someone who was willing to help.  

He had me do a trace on the Daz site which was not pinging correctly it seems, so after about 15 pings, he had me copy the info in the box, put it in notepad, and email it the dslsupport at Optusnet.  He also did say that the recent earthquake may have had something to do with it.

So all I suggest is you ring Optus yourself and do this trace (with their help) and email yours to dslsupport at Optusnet yourself.  Hopefully that will fix our problem and we will be able to shop at DAZ again.  Good luck to us.  Jan