I am releasing the code for the Baby-2-Woman Silverlight Loader demo project. You can download the solution from Api Junkie's Silverlight Loader project on CodePlex by clicking on SilverlightLoadersSolution.zip. It is a complete solution that you can open in Visual Studio 2008 and contains everything you need to get started creating your own loaders. You can find all the graphics and animations in ProgressBaby.xaml if you open it with Expression Blend. The code that updates the animation as the download progresses can be found in ProgressBaby.cs.