I really hope someone mirrors this on github or something, because there is no guarantee that a website for a closed company will be around for any length of time.
I lost some important records because yahoo shut down it's group archive last year (and banned the archive team from saving stuff wtf), and it's been on my mind lately.
We (ArchiveTeam) are still trying to archive portions of Yahoo Groups (our methods have changed a bit since Yahoo turned off the web archive in December, but the data isn't deleted until Jan 31).
If you're a member of the group (or can join it now) it's only a few clicks to make a request for the data. Doesn't get absolutely everything but all the emails/posts should be included.
I lost some important records because yahoo shut down it's group archive last year (and banned the archive team from saving stuff wtf), and it's been on my mind lately.