Adobe has recently demoed a tool to convert a Flash file to HTML5.
Quoting Mashable:
(Flash) animations or interactions will now be viewable on all kinds of devices — including the iPhone and iPad. This is where we think that this HTML5 conversion tool has real possibilities. It’s one thing to be able to convert a movie or animation — that’s impressive — it’s the resources within those Flash files, however, that are potentially more useful.