Flash 10 was release only a matter of days ago. It appears to be backwards compatible so shouldn't be of any concern. The big advantage of Flash 10 it that the waviness is gone. (So long as the panorama is compiled with Flash 10 compatible software) Easypano I'm sure will be looking into this. Other software companies have already started to release this.

I have updated some of my panoramas to Flash 10 Here is an example (You will need to select "Flash" if you have Deval or Quicktime installed as my code will look for these viewers first).

Regards, Smooth