Walmart now features on their Holiday Savings page a list of toys alongside the previously mentioned $100 Gift Card Deal with BlackBerry Phones purchases.
Among the toys listed, the hard to find Zhu Zhu Pets hamster at the low price of $8 stands out.
Update: Walmart has removed the Zhu Zhu Hamster from the Holiday Savings page. I assume they are out of stock.

Walmart always has the Zhu Zhu Hamsters listed online for $8 (See our Zhu Zhu Pets Shopping Guide), but I never saw them in stock.
Now that Walmart published the $8 Zhu Zhu on the Holiday Savings page, I would assume they actually have them in stock in stores now.

I guess the only way to find out is to head down to a Walmart and check it out. Unless Walmart has just gotten a truckload of Zhu Zhu Pets chances of finding an $8 Zhu Zhu are slim, because of the high demand.
Zhu Zhu Hamsters have prices on 3rd party offers on Amazon of almost $50 already.
See also our Zhu Zhu Pets overview and reviews for more details on the hottest holiday toy of 2009.

Updates:
ToysRUs announced to make over 1 million Zhu Zhu Pets and accessories available from Friday, December 18th to Christmas. With Walmart and Kmart Zhu Zhu Pets sales announcements there should be finally enough Zhu Zhu Pets to go around. Target is said to also get Zhu Zhu Pets stock.

Walmart announced Zhu Zhu Pets sale in-stores starting on Monday, December 21st. More details.

ToysRUs seems to have solid supply right now (12/07/09: 7amEST) of the $99.99 Zhu Zhu Pets Giant Hamster City Playset.

Zhu Zhu Maker Cepia Responses To Unsafe Claim By Consumer Group

Walmart Lists 4-Pack Zhu Zhu Hamster Pack for $32 Online

New 2010 Zhu Zhu Hamsters surfaced on Amazon and eBay.

ToysRUs will have tens of thousands of Zhu Zhu Pets in stock starting Black Friday. Reports indicate that stores had Zhu Zhu's in stock also over the weekend.