[plt-scheme] ipc among mzscheme processes

Off-topic:

Neil, while I'm not exactly a *fan* of XML-RPC, your claim that it is
a "non-use" is stronger than any I would have made.  Could you please
explain the extreme part of that point of view?

(If this gets too off-topic we'll take it to private email, but for
now perhaps others might be interested also, so replying to the list
is fine.)

Thanks,
Shriram