Juryiel, I actually think going for WebM might make it tougher. Microsoft and Apple probably don't want to be seen to endorse anything Google comes up with, but Ogg is more or less totally neutral. WebM still stores Vorbis audio as well, so one probably comes with the other. Also, Ogg has been around for 10 years now and WebM just over one year - tools, existing libraries, and general support for Ogg is probably better as a result. Anyways, it doesn't really matter, Ogg is fine so we're all in for that.