Re: swift- prefix.
The Core Team has been talking about this as well and agrees that there are things in the org that can have the swift- prefix removed. We'll update folks when we have come up with a decision and a matrix on what gets a prefix v what doesn't. As @Finagolfin mentions, we need to uncouple this from the migration though. We'll update folks in a broader sense about the prefix and repos that will be changed in the wider -dev category here.
Re: migration schedule today:
We are also moving 2 additional repos today in the Foundation window. Check out the full line up in the mega GitHub Org thread.