Have found a new source, some gaijin otaku talking about this:
http://forums.animeondvd.com/showflat.php?Cat=&Number=665182&page=0&view=collapsed&sb=5&o=&fpart=all&vc=1
> X - response. From X|X.
> X� - thread. From Xbh.
> JLR - an entry on someone's personal BBS or something. From «�.
> ø - proxy. The kanji is kushi ('skewer') and is from vNV.
> I - server. The kanji is saba ('mackerel').
> C - account. The kanji is aka ('dirt').
> �Ah - e-mail address. From �[AhX.