The basic idea before snore mouthpiece is that this thing is a dental device that does not let tissues to collapse in order to make same apnea problems and breathing problems over the night. It's cool and it may be useful, but before getting it you may go to the dentist in order to say to you same things from the size to the secundar effects and so on. You really have to be sure about the things you are doing if you really want to have the effect you expect and not other.
In the meantime I've been checking some snore mouthpiece device and I have to say that this is kinda cool and you have to try it in order to know. Ah.. look here the link to Google trends about snoring mouthpiece statistics: http://www.google.com/trends?q=snoring+mouthpiece&ctab=0&geo=all&date=all&sort=0 It may be useful to you, I've searched twitter but I could not find any things about it because people tend not to write about their dental problems around twitter so much or I did not find them, anyway, good luck with searching for a snore mouthpiece and going to the dentist.