There have been rumors of an upcoming release offering Chromecast support. I don't see Chromecast listed as an input media for 2.2.0. Does anyone know if this is being worked on for a future release, or am I overlooking something?
Yes. We've been working on ChromeCast, and many other features for 3.0.0. It's been merged since a long time, but is not completely usable, therefore not released.
edit: It may be a longer wait...
https://github.com/videolan/vlc/blob/master/NEWS