Halazoon's snail
Halazoon (ex-Cocoon) is a python/GTK+ based client
to connect on the MSN Network.
It's based on the pymsn library which
is developed by a bunch of monkeys you can find on
#pymsn @ irc.freenode.net
You can fetch Halazoon repository using :

bzr get http://bazaar.launchpad.net/~jprieur/cocoon/cocoon

but you need first to install pymsn :

bzr get http://projects.collabora.co.uk/bzr/telepathy/pymsn/

It's not really usable yet, check the dependencies!
Halazoon makes use of the GConf configuration system.
Since Halazoon doesn't provide any config/install script yet,
you have to manually install the gconf schema :

gconftool --install-schema-file=src/hlz_gconf_schema.xml