Quoting Jan Steinman, from the post of Tue, 08 Feb:
My convention for sites I do is to make links that go off-site open a new window. Is there a simple way to do this? If not a simple way, where should I begin?
AFAIR Brion is against dictating that to the users (though some very good poits were raised in favor in a past discussion on this very subject). my view is that it's not too bad to leave this decision to the user (or rather his browser). for instance I use FireFox on both Linux and Windows and I always set links to a different site to open in a new background tab, because that's the way (aha aha) I like it. I would not want to force this on my users if they don't.