If you want your site mirrored and archived, contact ht(a)conlang.info. Pages will be recursively mirrored regularly (currently once a day), and you may have up to 5MB of conlang, conculture, conscript content with up to 100 files. First come, first serve, as long as server space is available. :-)
You can use this list of URLs for secondary mirroring.
Or, if you have wget, you can download this Makefile for secondary mirroring. It is generated from the list of URLs.