I play with Ogg related stuff when I have time, and may even contribute something back someday. I can't claim to be working on Metadata and Talk:PortablePlayers#Layout_of_the_PortablePlayers_list, but I do check by from time to time to see they're still there.
Some rather more concrete todos:
I don't have a lot of free time at the moment though, so if someone else wants to take care of them I'll be happy to pass my ideas on. I'm very rarely on IRC (#xiph and #vorbis), but regularly read the vorbis, vorbis-dev and ogg-dev mailing lists.