IrsTerm is a simple terminal targeted for remotely using irssi in screen. In fact, it cannot be used for just about anything else. When run, irsterm will try to connect to a remote ssh server defined in its configuration whenever there is a network connection available. Currently only Nokia N900 is supported.
Note, IrsTerm currently only supports UTF-8, and will only allow to run screen -Ux on the remote target machine.
What would you do without screenshots? Well, they don't really tell you much here, but here's the "normal operation":
And here's the almighty configuration dialog:
Point your N900 device here and click on the armel binary link, then choose "open in application manager".