This week's book giveaway is in the Other Languages forum. We're giving away four copies of Functional Reactive Programming and have Stephen Blackheath and Anthony Jones on-line! See this thread for details.
Welcome, not too sure what Flex exactly is; however FX is an RIA(Rich Internet Application) mostly compared to Adobe Flash. FX is basically an Updated Swing. New UI goodies, 3D, mobile support in the future, etc.