While we have >>>/librejp/ with us, here's some background about them if you were curious :

Info :
https://en.wikibooks.org/wiki/2ch_Chronicle/The_Third_Channel
http://yotsubasociety.org/Futaba_Channel_briefing/
https://drive.google.com/file/d/0B65Ds38eu5cLTjlxa3JEbzR2d28/edit
http://ayashiiworldhistory.blogspot.fr/2012/10/futaba-channel-at-wikipedia-translation.html

English Navigator :
http://www.bluethree.us/futaba/

Some characters :
https://www.ostan-collections.net/wiki/index.php?title=Nijiura_and_Futaba_Characters

Archives :
The big one (may) : http://futalog.com/
The one who has relevant boards (may & img) : http://futabalog.com/
Same for downloading in html : http://tsumanne.net/
The one consecrated to 2hu fun board : https://futathlog.net
The one consecrated to may : http://2chin.net/
One for img : http://u.magipoka.net/
For img may jun touhou and kancolle + useful links : http://dev.ftbucket.info/scrapshot/
Librechan /jp/ archive : https://librearchive.cloudchan.org/jp/index.html