We have just finished transitioning mytaglist.com and wirelesstag.net, which are our web service the tag managers connect to, to a larger capacity Cloud server (50.56.64.225) at Rackspace. The DNS record may require 1 hour or more to update. Meanwhile the old server will connect to the database in the new server to allow seamless transition. If you have ever experienced any 503 service unavailable error before, then these will much improve with this transition.
However, there may be unexpected glitch, bugs, or service interruption caused by this transition. Please report any issues to support@mytaglist.com. These will be fixed as soon as they are reported.