We've just sent out an email to all admin users of FoxyCart, and have also posted on our blog, but here's the official thread for the downtime this Saturday (or Friday if you're before EST).
The details are here:
The quick overview is:
We're doing some _major_ upgrades of our servers, as well as moving the main app servers to a new datacenter. This will happen between 1am - 3am EST, Saturday morning. Please read the notes on http://status.foxycart.com/
prior to posting on this thread, but please feel free to ask questions about this downtime. While we sincerely hate to go offline, scheduled maintenance is a fact of modern internet life. Even Google, Apple, and Microsoft go down for maintenance occasionally.
In case anybody's curious (as it isn't really covered elsewhere), this is what your customers will see if they happen to hit the cart of checkout during the downtime. If anybody cares to provide alternate translations please let us know.
Again, we don't take _any_ downtime lightly, but this maintenance window will allow us to improve the reliability, speed, and security of our entire system, and it will ensure that our infrastructure can continue to grow as your stores do.
Please let us know if you have any thoughts or concerns about this. We appreciate your feedback.