I'm guessing Dave will have an opinion on this... :-)
I'm having a hard time deciding whether to stick with
Flash (our current prototyping tool) or move to Flex.
I purchased Flex, and it seems powerful, but at the same
time, it was a little more difficult to create an interactive
prototype. Also Flex lacks any layout guides, rulers, etc.
that are present in Flash.
But, if Adobe is moving in the direction of focusing Flash
more on Animation and Flex more on interaction, applications,
I don't want to be left behind, and wonder if we should
invest further in Flex now to be prepared.