OK, this has nothing to do with VNC viewer anymore and you want to install gaim. The gaim package that you want to install is for the 770, although it will work on the N800 if you get libxau0. The package is available--perhaps the easiest way to get libxau0 installed is to install osso-xterm, which also depends on libxau0. Add all the N800 repositories listed at the maemo wiki to your repository list, and you should be able to find both osso-xterm and libxau0. If you cannot figure it out from there, start a new thread, but please, don't post about gaim on this thread.

AaronL