My husband, daughter and I already have PRS-650s. I got mine mid-November, my daughter in early December and we got my husband's (his Christmas present) just as they ran out. I rang around and got one of the last ones in Sydney for him.
My son has also been wanting to get one so I have been checking every day to see if they were back in stock. Late last night (after midnight) I noticed that the black PRS650 was in stock at Sony Style Australia, the first time since they ran out. I told him to buy it straight away, which he did, and it is being delivered on Monday, February 28. He sent his friend a message to get one as well, and he also managed to order one.
By this morning it said "Limited stock available" and by just after midday they had sold out!
Either huge numbers of people bought them all very quickly, or they didn't have many to start with! What is going on with them?

I can't believe this continuing short supply, it seems ridiculous!
The red ones didn't seem to be back in stock at all. The black ones now show "Out of stock" but you can still add them to the cart and they then give you the option to order and they will supply when they get more stock, or they will email you when there are more. The red one still just shows the page but no facility to add them to the cart, and no comment about stock availability.
My son is very thankful I saw they were back in stock and really looking forward to getting his next week. So am I because he bought mine for me (as an early Christmas present) then didn't manage to get one for himself!

Now I will be able to use mine without feeling guilty!
Heaps of people I have told about them want to buy one though, and I have to tell them they are out of stock!