I asked this off topic in a different thread, but I guess it deserves a thread of its own:

One of my contacts already uses an N900, and I see his location as plain text in the XMPP status (which is a little annoying, actually; too long, usually irrelevant and changes too often when he's on the bus).

What I'd like to know is if the current XMPP-implementation in Fremantle also supports proper XEP-0080? Only this would allow to enrich the experience with applications like "beep if my friend is closer than 500m" or "drop call to girlfriend if wife approaches current location". (Parsing plain text for this won't work.)

Also, I'd like to ask a more general question about Maemo 5 in this context:
If XEP-0080 isn't supported... how easy/difficult would it be to implement it? I mean... the telepathy backend isn't closed AFAIK, but then you can't simply overwrite system components with you own variants without breaking SSU, can you?

Could you implement something like "the better XMPP" that co-exists with the standard implementation? Or would this break the whole messaging framework?