Our lovely Systems team are in the process of transferring the domain name for the Archive to a new registrar. This should be an invisible process to users, but there is a small possibility that it might cause a brief network outage. If you notice the Archive go down within the next 5 days, don't panic! It's not broken, and it will return speedily!
We're hoping that there will be no interruption at all, but as we have no way of predicting exactly when the transfer will occur we thought that people would appreciate a heads-up.