– A book by AdaptivePath called “Subject to Change” with the first chapter free to read here.
http://a.viary.com/ – These guys are developing multiple RIA’s in Flex/Flash that are really worth a look. Check the demo videos at their blog.
http://opensource.adobe.com/wiki/display/flexsdk/Flex+4 – With the official release of Flex 3 comes the planning for Flex 4 – “..provide a framework meant for continuous collaboration between designer and developer.”
http://issuu.com – a very nice interface for reading e-books.