if you install telepathy-haze http://packages.collabora.co.uk/maemo
chinook | haze salut idle telepathy-haze (v. 0.1.4-0collabora1)
and rtcomm beta http://repository.maemo.org/rtcomm
chinook | free rtcomm-beta-os2008 (v. 2.3).
With those packages installed you should be able to use the built-in chat client to chat on msn.
Go into menu => settings => control panel => accounts => new to set up your msn account
If you want to set up the built in chat to use your gizmo account for voiping
accounts => new => next => Sipphone.com => enter your user name and password => advanced => authentication => enter your user name and password => next, enter an account name => finish

in gizmo login => phonebook => @gizmo5 or Setup IM & Buy & press the im button at the side of it => it will pop-up a chat window that will give you a choice of which account you want to sign into and download those contacts. For Windows Live(msn) press2 and then enter, it will then ask for your username@msn.com, enter it hit return and enter your password. next thing you will see is Adding buddies. Please wait. This may take a few minutes.
(13:55:57) @Gizmo5: Success, your Msn buddies were added. Please restart Gizmo5.
(13:55:57) @Gizmo5: 9. Cancel & return to Main Menu