Flex in a Week
Even with the stir of excitement caused by uniPaaS, it would pay any Magic developer to investigate Flex as alternate RIA front-end to future Magic/eDeveloper/uniPaaS applications, I believe the Flex-Magic coupling to be a potent force for rich, rapid applications.
I'd heartily recommend the excellent Flex training that's available via subscription at Lynda.com or TotalTraining.com but Adobe also just released a free, quick and dirty Flex-in-a-week series of tutorials. A little rough at the edges in comparison, but this seems well-structured and detailed enough to get to grips with Flex quickly.
Check it out: Flex-in-a-Week