I'm 17 weeks and still waiting to feel something for sure. As for showing, I have a puffy belly. That's the best way to describe it. Right now I just look I could use some sit ups. =) All though, for the first time today, some women where I work were asking because they say, and I'm 1/2 Puerto Rican, that I've always had the Puerto Rican butt, and now I have a little in front too. I had to tell them I was preggo. Happy to say and happy to finally have people notice. =) I thought I felt little "tapping" every 3 days or so but I think it was probably gas.
Usually you wont start feeling the baby kick until about 18-22 weeks. Quickening (which feels like little flutters) sometimes happens as early as 14 weeks but its easy to mistake gas bubbles for quickening. I didn't start to show until about 22 weeks or so however it just depends on your body some people start showing earlier some people later.