[jadmin] Advertising xmpp

[Johansson Olle E]

There is some work on an IM: URL. I don't know how it applies to XMPP.
 From the draft:

"A.4 Intended usage
   Use of the im: URL follows closely usage of the mailto: URL. That  
is, invocation of an IM URL will cause the user's instant messaging  
application to start, with destination address and message headers  
fill-in according to the information supplied in the URL.
A.5 Applications and/or protocols which use this URL scheme name

  It is anticipated that protocols compliant with RFC2779, and meeting  
the interoperability requirements specified here, will make use of  
this URL scheme name. A.6 Interoperability considerations The  
underlying exchange protocol used to send an instant message may vary  
from service to service. Therefore complete, Internet-scale  
interoperability cannot be guaranteed. However, a service conforming  
to this specification permits gateways to achieve interoperability  
sufficient to the requirements of RFC2779."

http://tools.ietf.org/id/draft-ietf-impp-im-00.txt

/O