The Zhu Zhu Pets are the super hard to find toy of the holiday season 2009. Only ToysRUs has announced to get new Zhu Zhu Hamster stock in on Black Friday.
Tens of thousands of Zhu Zhu Pets are supposed to come to ToysRUs stores starting Black Friday.
The first 100 customers in line at their local Toys"R"Us store on Black Friday will each be given a ticket for the opportunity to purchase a Zhu Zhu Pet (with a limit of one per household).

If you try to find Zhu Zhu Hamsters online you are only finding this 6x over-priced offers on eBay and Amazon.
According to Zhu Zhu Pets Trackers Zoolert and NowInStock only ToysRUs and eToys showed activity over the last days. eToys had stock only of a bit over-priced bundle and ToysRUs has false positives. I have tried to put Zhu Zhu Hamsters that were marked to be in stock on ToysRUs into the shopping cart, but failed every time.

I watched a couple of Zhu Zhu Hamster Auctions on eBay and they currently end over $40 for a single hamster. Maybe you get lucky and come across Zhu Zhu the coming Thanksgiving weekend in the mall.
See also our Zhu Zhu Pets Shopping Guide for more possible purchase options and our Zhu Zhu Pets Overview and Test.