These 4 will probably not be resolved in any great hurry. I should
have something to offer regarding Unicode and whatnot this week (We
had a death in the family. Between that and work pressures, I've not
had much time, and am just catching up now).
In the meantime, I am happy to note that Rick Jellife has got ERCS
online at the SGML Open WWW site. Those interested should take a look
at:
http://www.sgmlopen.org/sgml/docs/ercs/ercs-home.html