I've met so many folks that I first "met" on the `net that I can't really count. Jinya is one of them.
As for sex on the first date, my first date usually consists of either spending a week(end) with them or moving in outright.
My first girlfriend was the only woman I didn't get with like, the first night I was around them.
Edit: That's not true; I once went out on a blind date with a chick from Yahoo! Chat that I really wasn't interested in at all, and nothing came of that night.