Wishpot has rolled out a new service, just in time for the holiday shopping rush.

The Seattle upstart has developed a new service that integrates with the new Siri voice assistant on the iPhone 4S that allows users to add items to a gift registry with a voice command, and then receive a text message response showing the item and where it can be purchased at the lowest price.

In addition to product names, shoppers can also read UPC or ISBN numbers of selected products.

Wishpot is led by CEO Max Ciccotosto, a Seattle entrepreneur who also recently launched the Venpop social shopping service.

Here’s a closer look at the Wishpot-Siri integration in action.

Santa’s little Siri from Wishpot on Vimeo.

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