I think the "gracefully" part is misleading. This could be done with Javascript and a simple CSS class added to the <button> is both graceful and degrades gracefully. But if we're comparing apples-to-apples, what's graceful about the Flash solution - opening one (possible more - Photoshop, etc) programs, learning a proprietary language (Actionscript) and exporting a binary that's not accessible to users or search engines, etc...