This is a first beta version of the viewer, take it for a spin and let us know what you think. Being a beta, you'll notice that the documentation is a work-in-progress and we plan to update it regularly over the next few weeks. Also, being a beta, there will be some bugs and other issues, but we wanted you to get a feel for what we are building so that you can provide us with some feedback on the Flex Viewer as soon as possible.
We are thinking to probably split it into - Flex Viewer (people working with configuration files) - Flex API (including people using Flash Builder to work with the source code for the viewer)