Initially we thought this would involve some downtime for everyone. But instead of that, we'll probably let everyone simply migrate whenever they're ready.
That means everything on the "old" Snap.as will remain live, but to upload or modify anything, you'll first need to kick off a migration for your account.
Photo hosting is one of the biggest feature requests we've heard from WF users, so I'm really looking forward to building this, too.
This instance is only for A Bunch Tell projects.