Shortly we will post instructions on how to change your MineCraft configuration to immediately use this new IP address. However, if you don't want to change anything and simply wait, your client will eventually be able to join the server. That could take up to 24 hours but usually much sooner than that.
So if you are reading this a few hours or more after I post it, first try joining Lucid as you've always done. In your client the server address should be myluciddreams.com. However, if you have an IP address in your Server Address then you must change it to the new one above. It's best to use myluciddreams.com as your server address.
The upgrade to 1.8.3 wasn't successful so Lucid is now running the same version it was before the upgrade attempt. The worst part is that some work people did on the 18th was lost. I'm sorry for the inconvenience.