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 :)

Classic Mistakes in Development Projects

I got this link from one of my friend and this is definitely a read. These includes the very day-to-day mistakes we made from the people, process and product perspective.
http://www.stevemcconnell.com/rdenum.htm

Adobe MAX 2008 - Enjoy the Experience

MAX is an experience unlike any other — an opportunity to connect with thousands of designers, developers, partners, executives, and Adobe staff for education, inspiration, and community. MAX 2008/2009 will be held in San Francisco, Milan, and Tokyo.
Adobe MAX 2008/2009 will be held in San Francisco (California, US), Milan (Italy, Europe) and Tokyo (Japan). Speakers and Session registrations are open.

MAX 2008 USA - San Francisco, CA - Nov 16-19, 2008
MAX 2008 Europe - Milan, Italy - Dec 01-04, 2008
MAX 2009 Japan - Tokyo, Japan - Jan, 2009

To view the interactive experience on Adobe MAX 2008/2008 and click anywhere outside the informational window.