farstream : Farsight2 is an audio/video conferencing framework specifically designed for Instant Messengers. ( http://farsight.freedesktop.org/ )
libsocialweb : Social web services integration framework ( http://git.gnome.org/browse/libsocialweb )
telepathy-farstream : Telepathy client library that uses Farsight2 to handle Call channels ( http://telepathy.freedesktop.org )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a keruspe
For Paludis use this rsync : rsync://gentoo.zugaina.org/keruspe-portage
If you have a problem : ycarus(-at-)zugaina.org