SIX Launcher will fall back by default as of v2.9.7pre16, available on auto-update right now,
For earlier versions, you can also enable the Option "Only rely on server list provided by the SU portal", in the Options.
Please stay tuned while we refresh and update the server list with latest information :)
UPDATEAs it appears Gamespy seems to work again!
Great, we'll be prepared for the next maintenance :)