The Zoom Quilt is the collaborative art project of 15 talented artists, all contributing to a final media presentation that is both beautiful and mesmerizing. The piece is available in 3 different media formats: HTML via a series of static jpeg images; AVI compressed video; or the best format, a Flash interactive movie. Click and drag up or down to move forward or backward through the work of art.
The first such "zoom" art work I saw on the Web was this rather simple Flash piece called Swirl.
And then there is the Poloroid photo project by Mark-Steffen Göwecke, which is a rather creative "zoom" concept itself.
During my travels, I also stumbled upon this site for Web design company SoFake.com, which incorporates a wonderful "zoom" piece into the navigation of their Flash site.