We created some Flex based component views using Flash CS5 by following the instructions in the Adobe Article Combining animation and ActionScript using Flash Professional CS5 and Flash Builder 4 which we used inside our course player. These View components had text fields which would dynamically resize when the player was resized on the fly(Only for firefox and safari, IE and chrome do not allow resizing). These views also had images which would scale appropriately as well.
Note this led to my series on embedding fonts due to conflict messages with respect to flex based textfield and flash based textfields(This is explained in detail in Part 3 of the series).
NIM ReFLEXtions 