Swiffy converts Flash SWF files to HTML5, allowing you to reuse Flash content on devices without a Flash player (such as iPhones and iPads).
Swiffy currently supports a subset of SWF 8 and ActionScript 2.0, and the output works in all Webkit browsers such as Chrome and Mobile Safari.
Swiffy is far far from being a serious candidate for anything that could be relevant for Flex projects, its clear that Swiffy is intended to parse banners and advertisements that typically is targeting Flash Player 8 using AS2 since the Banner systems all insist on the lowest common denominator when clients commit their assets… Swiffy will most likely never be relevant in the context of Flex and Flash apps.
However, you can check it out for the heck of it or if you want to automate the conversion of Flash banners to HTML…
************ UPDATE – 21. November 2011 ************
Google has posted an extension for Flash Pro for Swiffy:
They’ve mentioned the possibility of open sourcing Swiffy on the google
labs blog before, if there was enough interest (or something like that).