Ms. Dewey is pre-loaded with clever and often cheeky responses to search queries --ask for her phone number, for instance, and see what happens. Ms. Dewey pulls her results from Windows Live Search, and seems like a big fan of Microsoft's hit video game Halo --not surprising, since she's an employee of Microsoft.

The site, put together by San Francisco-based design shop Evolution Bureau, is part of a Microsoft ad campaign, according to the company, although Microsoft is not currently mentioned anywhere on the site.

Ms. Dewey is reminiscent of previously popular viral ad sites like Burger King's Subservient Chicken, but considerably slicker, and actress Janina Gavankar is a lot more appealing than a guy in a chicken suit.

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