This page will track information about MDL component set in FlexJS
At the moment of writing this, MDL implementation is complete for all components provided by MDL. A word of caution is needed since although all components are sets, the implementation need to be used and tested and many things typical in Flex development could not be supported at this time.
The actual implementation should be the angular stone for people wanting to use it and provides a good start for collaboration for the community in order to upgrade this library progressively.