Flex sites/blogs:
Adobe:
http://www.adobe.com/devnet/flex/
http://www.adobe.com/products/flex/productinfo/faq/
http://www.adobe.com/cfusion/communityengine/index.cfm?event=homepage&productId=2
http://blogs.adobe.com/
http://weblogs.macromedia.com/mxna/
http://labs.adobe.com/
http://labs.adobe.com/community/
http://www.adobe.com/cfusion/exchange/index.cfm#loc=en_us&view=sn610&viewName=Adobe%20Exchange&avm=1
http://blogs.adobe.com/flexdoc/
http://nondocs.blogspot.com/2007/04/metadatapercentproxy.html
Other:
http://blog.fastlanesw.com
http://www.searchcoders.com/flex/
http://www.flexination.info
http://flexibleexperiments.wordpress.com/2007/03/14/flex-20-primitive-explorer/
http://www.scalenine.com
http://www.flexcursion.com
http://www.theflexshow.com
http://www.JeffryHouser.com
http://blog.digitalbackcountry.com/
http://code.google.com/p/flexlib/
http://flexbox.mrinalwadhwa.com/
http://dougmccune.com/blog/
http://www.cflex.net/
http://www.quietlyscheming.com/blog/
http://www.everythingflex.com
http://www.waldosmeets.com/
http://www.jessewarden.com/
http://www.cbetta.com/blog/
http://www.cynergytv.com/
http://www.flexdaddy.info/
http://www.richinternet.de/blog/
http://www.brightworks.com/technology/overview.html
http://www.crossdomainxml.org/
http://flexsearch.org/
http://labs.flexcoders.nl/
Flex style Explorer:
http://examples.adobe.com/flex2/consulting/styleexplorer/Flex2StyleExplorer.html
Documentation:
http://www.adobe.com/support/documentation/en/flex/
http://livedocs.macromedia.com/flex/2/
http://www.adobe.com/cfusion/knowledgebase/index.cfm
Lists:
http://www.adobe.com/cfusion/webforums/forum/index.cfm?forumid=60
http://groups.yahoo.com/group/flexcoders/
http://groups.yahoo.com/group/flexcomponents/
Bugs/enhancement requests:
http://bugs.adobe.com/flex/
Cal
http://blog.fastlanesw.com/flexCal1/
Primitive
http://www.flexibleexperiments.com/Flex/PrimitiveExplorer/Flex2PrimitiveExplorer.html
Degrafa
http://www.degrafa.com/category/examples/
FMS
http://flash-communications.net/technotes/flex2FMSexplorer/flex2FMSExplorer.html
Ex
http://flexexamples.blogspot.com/