Animate Grid Cells

Hey everyone, I’m wondering if someone could explain or point me in the right direction to learn how to animate cells in a grid. An example being http://www.smetana.net/ when the cells fly in to form the grid at the beginning randomly. I know how to create a grid and dynamically load content into each cell with XML, I’m just wondering how to achieve the animation at the beginning forming the grid?

Thanks for any help!

Matt