Screencast VP8/WebM support?

[Ryan Peters <sloshy45 sbcglobal net>]

I have recently tried out the fantastic GNOME Shell built-in screencast 
recorder, and while looking through the gconf settings for it, I was 
reminded that it saves videos in Theora format. Since VP8/WebM has 
proven to be a much better container and video codec, could it be used 
by default or at least available as an option?

On a related note, is it planned/allowed to be able to record audio as 
well as video?

    -Ryan Peters