I was thinking of doing DotT next. It was either that or finish Monkey Island 2, but since I lost my MI2 CD, it will probably be DotT.
The Ogg Vorbis Digital Audio files can be played with the latest version of Winamp and several other players. If you want to use Windows media player, you need to install this filter first: http://tobias.everwicked.com/oggds.htm
However, I'm not sure if that filter will work with the next update, since I'm updating to a newer version of the Vorbis codec.