Japanese and few English
SBC's Web-site. Sendai city is located northern part of Japan. They provide War Game Processor modules in English. My be one and only site to support WGP in Japanese. More than 50 modules are released.Link is here.
http://homepage2.nifty.com/mootake/sbc_hp/wgp_kanren/WGP_E_list.html
Japanese
Fal's Web-site.
He provides Wingcalibre ON THE WEB. That is based on the Japanese Anime-game. He programed CGI to play the game on the net. Further, he aims Air Force(AH) and other games.
English
PBEM Si-Fi campaign site.
http://sfccampaign.tripod.com/