Pex posted on the official forums that there will be more downtime tonight.  I wonder if this will include the storyline content Laralyn was Twittering about?

Hey all. We're planning to do some game updates tonight. The maintenance will start between 9pm and midnight and is scheduled to last for 90 minutes. We will make announcements in-game before we begin.

Here's a handy timer convertor to help you plan!