http://www.baseballprojection.com/war/d/damoj001.htm
46.5 WAR. If he plays enough to reach 3,000 hits (I think he will), he'll be in the borderline area of 55-60 WAR. Depending on how his remaining years go, I'd be inclined to vote no, because he had no peak to speak of and while churning out 3 WAR seasons for 15+ years is certainly an impressive feat, I'm not sure it warrants HoF induction.
Mike Cameron, by the way, is virtually tied with Damon in WAR and while I think Damon will finish his career with slightly more, I don't think it's right that Damon will, at worst, languish on the ballot around 20% while Cameron will fall off immediately.