If you're talking about basic vectoring, that's nothing. It's not even a talent or skill. Just grab Adobe Illustrator, Flash, or even Photoshop, and learn how to trace lines with the pen tool. That's literally all basic vectoring is. Tracing. But if you're talking about what I do, then that's a bit different. Most of my stuff isn't traced or even referenced anymore. I'm actually drawing. I just use vector based programs. And to do that you'll obviously need to learn a lot more than just tracing others' work.