It's a bit technical, but it's important to read - CCP has moved around some servers and tweaked some settings, and they're letting everyone know what happened. To prepare for DUST 514's beta - a game that is primarily about inter-communication between it and big brother EVE Online - they had to make some adjustments to servers, and Singularity was the server it was handled on. Buckingham, originally, was used for testing DUST, but now has become the EVE public test server while Singularity is used for DUST.
Did you get all that?
If not, there's diagrams and breakdowns for those interested, and best of all you can download the full build and log in using the tutorial they give you on the site. It's not a requirement, but they are testing out orbital strikes from EVE on DUST battlezones...so, you know, there's that.
Julian "Mirai" Williams