extra protocol plugins for conversations and contacts 0.7
--Telepathy-butterfly

link-local xmpp protocol plugin for conversations and contacts 0.7
-- Telepathy-salut (Jabber)

lirc 0.8.4b-1fremantle30

msn (pecan) protocol plug-in 0.1.0-rc3-0maemo1
--Telepathy-pecan

msn protocol plugin for conversations and contacts 0.7
--Telepathy-butterfly

pidgin protocols plugin for conversations and contacts 0.7
--Telepathy-haze

pidgin extra protocols (bonjour and sametime) 2.6.3-6nix0
--Comes with pidgin protocols plugin for conversations and contacts 0.7

Which to uninstall pretty much depends on which telepathy you want to stick with (mainly for msn). I haven't tried both butterfly and pecan yet but I can confirm video chat doesn't works with haze

edit: just tried Pecan, don't think webcam works. Only difference is when I initiate video call to Haze, it'll be cancel immediately (mentioned by fraaaaanka) while Pecan just does not (keeps pending but never receive any invitation from n900)