According to the new Newsletter the server is moving (again) to irc.rizon.net.
The full newsletter is as follows:
Dear 5294! ()
We just updated Wurm Online with new graphics, sounds, client and server code in a great big patch. We hope that it makes the whole game feel more polished and gives you an even more pleasant experience.
You can find the whole list of updates at http://www.wurmonline.com/newsmenu
Now are at work with the new tutorial and the Epic server code. It may be a good idea to return and wipe some rust of your RL skills before we open the Epic server since we expect something of a land rush and a mass return of old players. The release date is still to be announced, but make sure not to miss that event!
The Wurm Online Team.
PS. We have changed irc server to irc.rizon.net/6667 DS.