We've had a lot of new users over the past year, so we are going to upgrade our servers tonight to help accomodate for all this growth. This should make everything load faster, including your websites. During the upgrade your website should not experience any downtime, however the editor and any other apps will be unavailable for about an hour starting at 10pm CST tonight.

Other then that it shouldn't really effect anything. Let us know if you have any questions about this.