you should be fine; unless its a huge shard of glass, i wouldn't worry about it. you've probably eaten far worse, you just didn't realize it :]

i remember a day in school when somebody was 'fake smoking' his (short) pencil and he accidentally swallowed it ... he had to eat yogurt and wads of cotton wool ...

i don't think a small piece of glass is going to kill you :D

oh wow, I don't think it will kill you, but probably cut you from the inside. but I don't think the cuts will be major and heal up pretty quick. keep us updated.