what about the .ogm format?
is it officially dead?
what about the .mka and .mkv ([http:://www.matroska.org matroska]) format?
someone says that vorbis streams are smaller if contained in .mka files instead of .ogg files.
Add xvid as TEMPORARY option until theora gets to 1.0
Because it's mature and OpenSource, I would suggest allowing this codec to be used in ogx and ogv files as video codec. But only until theora gets ready to 1.0 and users that have already video's they can just convert it in the appropriate format.