Almost everyone dreams of that big break, of making millions. Be your own boss! Own a yacht! Invent a groundbreaking device that will help the world and make you a lot of money. This week, CBS News 48 Hours takes a look at several people who have hit the big time, one way or another. Cybersex Sells:: Meet two online entrepreneurs who are making loads of money from the unbridled lust of Web surfers. A Designing Woman: Buxom beauty Shoshanna Lonstein first gained fame as Jerry Seinfeld's teenage girlfriend. Now she is making her mark, and a lot of money, as a clothing designer. Grandma's Goo: Sculptor and inventor Patricia Billings, 72, may have come up with a revolutionary building material that is impervious to fire. Tales From The Cryptographer: 17-year-old Sarah Flannery, who lives in a small Irish village, has a talent for math. She's so talented, in fact, that she's come up with a new cryptographic code that may change the way business is done on the Internet.