Psi follows my tune
As 
remko wrote, the Psi people are
working hard on getting some publish-subscribe
support in their Jabber client. I've waited long for someone to pick up
on this, so this is good news. They started experimenting with User Tune,
that lets users publish information about which music they are
currently listening to.
For a while, the
Jabber World
Map and Jabber
Fishtank have been showing User Tune information for remko
and me already. For me, this information is published by tune, a small utility
that monitors Rhythmbox and publishes song information to my pubsub
node. Then, ralphm.net's bot subscribes to this node
and stores the notifications so the website can show that.
So, an development version of Psi now also shows my tunes when you subscribe to my node. Very cool! Keep up the good work, and maybe you can show me being happy, next?