Whenever I have to speak to a group, I now always preface with "I have a bit of a stammer, so if I get caught-up, please bear with me". When I do stutter, I see supportive smiles on the faces of the audience, rather than confusion and uncomfortableness. I've also found that "I have a bit of a stammer" flows out of me much more easily than "I have a stutter". One of the most annoying aspects of stuttering for me, is that the damn word itself is so hard to say! :)