What Non-Flex Resources Have Helped You with Flex?

That is exactly the question Matt Chotin is asking the Flex community. Go ahead and comment on his blog entry about your learning experiences and source.
My personal take, I learnt Flex (of watever little I know) from the online community reads, blogs, Flexcoders, and ofcourse Adobe site reads. I have not read a single book till day but would like to read atleast a couple of them :)