Huzzah! After a bit of a mess, the SL forums are up and ready to roll! Thanks to Nabble for providing the free, embeddable forum!
1: From the SL homepage, click on SHARD Forums.
2: This'll take you there. In the upper right-hand corner of the window, you'll see a option labeled register. (Or, if you've ever signed up for a Nabble forum, click login.)
3: You'll need to provide a username, email address, and password.
4: That's it! You can customize your account but for now there's virtually nothing to see or post. Hang in there for now!
But cool, no? Thanks to the Helplogger blog, which provides many good tips to improve Blogspot blogs!