IƱaki Baz Castillo wrote:
Architectures of XMPP and SIMPLE (OMA specifications) for a full rich presence environment:
SIMPLE (OMA): http://oversip.net/public/SIP_SIMPLE_OMA.jpeg
To be fair, that *is* a *bit* of an oversimplification of XMPP mechanics. :-) But not much. I vote for XMPP.