While browsing through my favorite news sites today I discovered that the the nightly builds of Firefox now include native support for Theora and Vorbis (which includes support for the HTML5 media elements).
It is really great to see that they are taking the initiative add this along with their other changes slated for version 3.1. If anything else it will at least help show users that there are formats available for them to use which are not proprietary.

Full story: Moparx