Brian,
BEC> In TASL, a pair of MUltihoming SHims (MUSHes) communicate independently of BEC> the IP flow that is to benefit from multihoming, using TLS, in order to
I apologize for seeming to be reading-impaired, but I am not seeing what significant differences there are between TASL and MAST.
Cuter acronym? :-)
Seriously, there is obviously a very close relationship (the actual protocol exchanges would be like those in MAST and NOID, so I didn't spell them out). But when I re-read MAST I don't see it clearly stated that a separate, reliable, and secure transport connection is used to carry the exchanges - that is suggested as an option at the end of the MAST security considerations, but it is basic to TASL. And I don't see any need to use XMPP as you suggest in MAST. So I'd argue it's a simpler approach, but clearly closely related.
Brian