We will be performing scheduled maintenance on Tuesday, August 21st. Maintenance will begin at 3:00 AM PDT and is expected to last for 10 hours. During this time, all servers and many web services will be unavailable.
Thank you for your patience."
Looks like the right timeframe window for a patch to me...
Extended downtime and they announced the patch would be this week. I don't think anyone has insider information here, but they've more or less confirmed patch tomorrow by the aforementioned events and release of patch notes.