I'm in Tokyo, but I though I'd mention a correction.
Actually, Jon Postel used the word intranet in RFC 753
<http://www.internic.net/rfc/rfc753.txt> in March 1979. I happened to
have checked this before when trying to find whether it should be
capitalized or not (usage seems to have gone against over the last
year).
I decided this was hopeless when I realized that in RFC 2101
<http://www.internic.net/rfc/rfc2101.txt>, the Internet Architecture
Board uses both intranet and Intranet in the same document.
BTW, you might forward this thread to William Safire at the NYT, who
writes entertainingly on these subjects in the Sunday magazine.
- dan