I'm not sure what links were posted here but I also visit Fred Miranda's site and its forums. The problem is, it's VERY digital-oriented. I've tried to push film topics there only to have them turn into digital vs film wars from the multitudes of digital fanboys who are blindly obsessed with digital and spout off the 'disadvantages of film' which are more like marketing hype for digicams that they're parroting that has no base in reality. On the other hand, the few there who shoot film turn out some great shots and have solid knowledge. Even some of the digital-shooting pros there are at least very knowledgable and can offer tips on general photography.
Besides that and others listed here (rangefinderforum, photo.net), I love Unblinking Eye. I don't even think it has forums but it does have articles on films, developers and alternative processes as well as their staff's recommendations for film/developer combos and techniques. Really, really cool stuff.
Occasionally, I visit Luminous-Landscape.com but mainly to check out old articles based on film equipment. These days, he has been converted to a digicam cheerleader and is declaring even P&S digicams as superior.