Reviving the Filk Discography Wiki
This wiki contains a hugely useful and valuable discography for filk albums, and it can continue to be a good resource for filk fandom. Apart from the filk discography, it can also serve to complement Gary McGath's filkbook index. A wiki like this will be less structured, but also be much more open for collaborative editing.
Other things that can be included are guidelines for running or organising circles, information on past or recurring filk events, and so on. Mini biographies of filkers and filk groups can also be included.
Due to the default licensing that fandom.com uses (CC-BY-SA) I do not see this as a good clearinghouse for song lyrics. While songwriters themselves can add their own lyrics, I think it's best to avoid that entire set…