MIME-XML technology?

Does anyone know what the "MIME-XML technology to wrap and send the
message" this article discusses might be?

http://www.sdtimes.com/news/015/story1.htm

It sounds at the end like there's some Sun messaging spec (JAXN) involved,
but I'm pretty irritated to find 'MIME-XML technology' set up in some kind
of weird contrast to SOAP.

I don't love SOAP, and I doubt the journalist was given great information
about this 'MIME-XML' critter, but I'm really scratching my head.

Simon St.Laurent
XML Elements of Style / XML: A Primer, 2nd Ed.
XHTML: Migrating Toward XML
http://www.simonstl.com - XML essays and books