I wouldn't want/need an email newsletter myself Seb; I've got the forums bookmarked but I almost always access them through the front page anyway. Just habit, I guess. But as a consequence, I rarely miss something that might've been of interest to me. That said, users who only use the boards might appreciate a heads-up in the form of an email.
On another site I frequent, the site owner simply starts a thread on the main board about whichever new report/article he's put on the main body of the site, for the benefit of those who might not go looking for them. Worth a thought, maybe.