The Monday content activation is encountering some problems and is delaying the opening of the world. We are investigating the problem and working to get There up and running as quickly as possible.
Please bear with us, and watch this space for further details.
Thanks,
-There Operations
UPDATE: We have cleared some of the blockages. The world should finish updating itself and allow logins in about an hour.
Thanks for bearing with us!
Update, Resolution: We fixed the problem and opened the world. Please do let us know if there are problems.