I don't remember if this was included in the 3.0.2 version of webOS flash, but in 3.0.4 you can now focus and then fullscreen a flash object by:
-Double tap flash object to gain focus
-Hold on flash object for 5 seconds to bring up a semi transparent menu with a full screen icon to enable. No more accidental pinching and losing focus. Goes back to webpage when going jnto card view. Takes up WHOLE screen (depending on dimensions of flash object). Better sharpness.
- Flash performance is still poor.
- Requires a few tries