Your site is scheduled to be upgraded to Shotgun 7.0 this Sunday - August 14th - beginning at 9AM ET. (Convert to your time zone here.)
We'll be upgrading a handful of sites and anticipate the update taking less than 3 hours for all sites. When it's your site's turn to upgrade during this window, your site will be inaccessible for roughly 5-10 minutes.
Head over here for full details and documentation about the Shotgun and RV 7.0 Release.
If you have any questions, comments, or need to delay the upgrade, please drop me a line.