Every forum (save one very large one) I've participated in that did not include an option to access and interact via email has dwindled away to irrelevance over a short period of time, regardless of member enthusiasm. Email is essential for discussion lists and forums, even if some prefer going directly to a forum interface. Yahoo, for all its quirks, at least offers a dual system.
Brook _______________________________________________________ Brook Hinton film/video/audio art www.brookhinton.com studio vlog/blog: www.brookhinton.com/temporalab