I’ve added a brief description of the tag cloud page, as well as modifying the documentation for the song list and dance style pages to reflect changes that I made to add capabilities to filter on tags.  With this the documentation is roughly up to date with the code (a strangely odd feeling from a programmer’s perspective) and I’ll be rolling out a beta for user tags soon.  If you’re interested in participating in the beta, please sign up via this feedback form.