GIFfun™ by Stone Design is the key to creating Web Animations quickly - you can use Create™ to make the individiual slides, or drag in any Image File directly into the GIFfun window, and the best part is that GIFfun is totally free, including the well-commented source code. GIFfun was originally created because I wanted to add yet another feature to Create, but this tool is also of use to every web page designer.