Something else I forgot to ask....

In order to make a request for a file even via the push mechanism you mentioned, I have to make the request to a real address, correct?

This means that even with the push mechanism, in order to get someone to push I've got to send the request to a "real" address, rather than an RFC-1918 address, however when the requests go out, I'm seeing them try to use the RFC-1918 space address for the requests. Should this be happening?