World 18 now has its own client, with a new login screen. It's in testing and ships with the alpha.

Dev update · The road to alpha
A look at what we've been building since the last update. There's nothing you need to do yet; this is just where things stand.
A client of our own
Getting Started guide
There's a new beginner guide in #guides: what to pick on your first login, what you start with, and how to get around.
A new website
world18.org is being rebuilt from the ground up. The new pages go live before the alpha opens.
Under the hood
We're making sure the server saves everything before it stops or restarts, so nothing you do gets lost.
Coming up
Next: the first alpha testers. We'll post here when the doors open.