Chris Kiritz made several big announcements in a blogpost on the Community page of Wizards.com concerning Magic Online yesterday. Included in the post are news items such as:
1. Magic Online's rescheduled Beta Wide Spotlight, starting Thursday, June 13 at 10am.
2. Modern Masters release events next week starting Friday, June 14 at 10am.
3. Make-up MTGO PTQ for Pro Tour Theros on Sunday, June 9 at 7am.
4. Changes and upgrades that occured during the Wednesday, June 4 downtime.
For a full recap of all of the changes, you can read Announcements - June 4, 2013 here.