The video below shows Flash content running on iPad Safari browser using Frash –
The development of Frash is still in progress. The keyboard input and video playback are yet to be supported. Also at present it’s only available for the iPad it would soon be available for iPhone 3GS and iPhone 4. This is what the developer has to say about it –
“…Frash currently only runs on the iPad, but support for other devices (3GS+ only due to technical restrictions) is planned, as well as support for iOS 4….
…Video and keyboard input are currently not supported. The former will require major reverse engineering of the video decoding frameworks on the iPhone, but the latter should be reasonably easy to implement.”
At this time it’s difficult to comment on the performance and battery life while running Frash on iOS device but from the video demo above its evident that Flash runs pretty well on them.