Well..
- Jabber is better, it's public standart, like email, it's (...) Why are you not using it?
- Erm... because everybody use icq/[you name it].
- But you can use jabber with it. There are agents, multiprotocol clients (...)
- I don't want.
So my problem with jabber is contact list - half of it don't want to use jabber, even as second protocol.
(and don't forget about google-talk)