The servers hosting these services will be changing IP addresses during this time as their current subnet (128.32.139.0/24) is being repurposed. DNS will be updated at 7:00am as well, so you shouldn’t need to make any changes to client applications unless you’ve been accessing any of these services directly by their IP rather than by their DNS name.
UPDATE
[2009-02-25 08:26:29 | Emrys Ingersoll]
All services are back online with shiny new IP addresses.
Most were only offline for only a few minutes, though the IRIS website was down a bit longer than expected due to being unable to mount an NFS file system as the filer had cached the server’s previous IP.
Resolved as of 2009-02-25 07:50:00