On a fresh N800 (I've just reflashed mine) if you add the above repository you only see one osso-xterm package available for installation, and it works fine (for a logo it has a $ superimposed on a black xterm window).

And I've no idea what a "stylized logo" looks like... that's a really unhelpful description from the maemo page - I mean, if you only get the one logo listed is it or is it not the stylized logo?!