On June the 9th from 10:00PM CDT on, Rackspace will migrate some of our servers to another location in one of their datacenters.
According to Rackspace it is not known, yet how long that will take !
What does that mean for you ?
If you are still using svn.plone.org to checkout old code/plugins make sure to do that before, during the maintenance window, svn.plone.org will be down.
This site [static html, with download link of old dev.plone.org] will be down.
During the maintenance window you will not able to download the content of the old dev.plone.org or good-known versions also, no svn checkout [svv.plone.org] will work.
This will not effect downloading Plone 4.x, Plone 5.x, Unified Installer or Add-ons !
Thanks for your understanding !
Plone Infrastructure Team