I've been messing with Empathy recently while setting up a Jabber server, and I thought I'd try out telepathy-butterfly (the Telepathy MSN connection manager). The packages in unstable/experimental kind-of worked, but there were some distinct features missing. Upstream's devel branches of the three main components (telepathy-butterfly, pymsn and telepathy-python) contained most of the functionality I was after. It seems the last release (which is packaged) is rather old.

I created some packages of these snapshots. Add the following lines to /etc/apt/sources.list:

deb http://jonnylamb.com/debian/telepathy-butterfly ./

And execute:

sudo apt-get install python-telepathy python-msn telepathy-butterfly