What tools to use for developing flash/flex based touch screen user interface for embedded system

We are looking at developing a device with a touch screen and an embedded PC like computer for the user interface.

What are the benefits and disadvantages of using flash/flex for this user interface development?

One of our goals is to seperate the design (= look and feel) and the functionality of the application to ease the development.

From stackoverflow Ber

• Regarding Flash

  Pros:

  • Readily available
  • Powerful editing tools
  • Lots of people know how to use it

  Cons:

  • (Very) bad performance in contrast to what it does
  • Open source implementations still lagging
  • Use of Adobe's flash component is regulated by their EULA
  • Does not offer a clear cut API for embedding
  From David Holm

• If you want design and look-and-feel... I would steer clear of Flex. It takes an Adobe employee and a great deal of free time to skin a Flex application.

  Look into Adobe AIR. It allows for the development of Internet applications that reside on the desktop.

  From eric