The reference wiki is located here. It's a resource at Anthologica targeted at helping people develop content—and get around the site. So far we have a few projects on the go; Nessari is working on cleaning up the Natlangs hierarchy, Nort (with help?) has been developing a vowel systems reference work from old Zeeb material, and I've put up a little bit of stuff on writing systems that I plan on extending further. It's also the place where the Anthologica Documentation can be found.
The reference wiki is open to everyone, though for neatness's sake you must request access to it first. Drop me a message if you want in. (Or just ask here!)
To start things off, I thought I'd ask what sort of documentation/tutorials people think the site needs. What's hard to do right now? I recently added a Footer Quotes page so you can see all of the various weird things that pop up on page refreshes without hammering the server O(n²) times, as well as a general Site Statistics page that lists overall counts.
On the subject of language families, I've taken the liberty of chopping the n off North/South American (Geographic), and added a Mesoamerica (Geographic). Noting them for boundaries as well; for families which straddle (Uto-Aztecan, any others?), I'm putting redirects in. Caribbean I'm inclined to group with South America; opinions welcome on all of it.
Sorry about the permissions issue; when I fixed a slew of permissions issues about a week ago, I missed the case where language families received new wiki pages. From now on, new wiki pages will be fully at the mercy of all group members, and users will need to restrict them as desired rather than permit access, as is already the case with all other universe-related entries.
No, we don't need a huge long list. Highlights from each family can be noted (and hyperlinked) in the synopses.
As for you joining, I'm not necessarily opposed so long as you realize this is supposed to be useful to everyone, and we can't go running off with our pet theories (a good example being that I didn't put IE, Uralic, Dravidian, South Caucasian etc etc into a Nostratic superfamily).