A week ago or so, I sent an email to PlanetQuake about some of the sites that don't currently work. They will return, the addresses haven't been set up.

Mindz keeps pointing out, for instance, the Quake Name Maker.

It's still around, but the final DNS hasn't been setup

http://hosted.planetquake.gamespy.com/quake_names/

Originally posted by Pappy-R
I'm well aware of the importance of Quake resources and
have been fighting to keep them for years.

That being said, nothing is "gone". Some hosted sites have been migrated to the new services already but alot have not.
And many of the sites that don't currently work can be made to work by doing the following (in the meantime) ...

http://hosted.planetquake.gamespy.com/<whatever it was before>

Like ...

Old:

http://www.planetquake.com/worldcraft

Temporarily is (this works):

http://hosted.planetquake.gamespy.com/worldcraft/

Will be (I'm guessing):

http://worldcraft.planetquake.gamespy.com