If it helps, I ordered mine at 12:54pm on 22/12/11 and on the website, my order still shows as "processing" too.
If nothing else, I take today's e-mail notification as a sign that they have finally begun to ship.
Even though they are supposed to be coming XpressPost, I was not given a tracking number so can't really estimate delivery but hopefully tomorrow or Monday.
Just a little aside but the RCM seem to be failing to provide tracking information lately. None of my purchases in the past 9 months have had tracking information provided in the shipping notification e-mail or the website tracking though sometimes a tracking number shows up on the website a few days after
I receive the items. I'm not sure if others have this issue but bringing this to the attention of the mint has gotten me nowhere. Over the years I've had stretches where I get good e-mails alerting me of shipments with tracking numbers, then stretches where I get no notification (coins just show up at my door) and now, e-mails with no tracking numbers. Nothing has changed on my end - same street and e-mail address - so I assume it's system issues at the mint. It's all very inconsistent and frustrating. End rant.