LordAlex co-authored the Friends of Ed book: “Flex for Designers” and is reviewed on two sites:
On our Montreal Adobe usergroup (click here) and I recently found a posting on the DMXZone (A tutorial site administered in Europe). They are giving away 5 books and you can download chapter 5 from this link. Click here. I talked to Lee Sutton who works for Adobe the other day, and he read it in one sitting when flying back from the West coast. He was surprised that you can also skin Flex components using Fireworks CS3.
BTW, the chapter that is freely downloadable from DMXZone involves Illustrator and Photoshop CS3. This is pretty cool considering that Flex is geared towards developers.
For more info on the book, check it out here.