I see Suzanne was quicker on the reply! She posted while I was writing this....:D
No, they're quite different. Scones are made somewhat like biscuits- very short dough, gently combined ingredients, with a biscuit-like consistency. They're tender, not crunchy.
Biscotti (means "twice-cooked" in Italian) are a cookie that's made in two stages. A thick batter is baked- either free-form in a loaf shape or in a pan. It's sliced while hot, placed on baking sheets, and toasted in the oven until it's pretty crunchy. This is called mandelbrot (almond bread) by the Jews, and I'll bet other cultures have a similar product. I've been promised the 90-year-old pans my grandmother used to make mandelbrot. They're about 4 inches wide, 12 inches long and 4 inches deep if my memory is correct.
I'm not a baker, but I know MBrown makes fabulous biscotti because I've tasted them, and KyleW does too! I hope someone who makes them frequently weighs in on this thread. Giada DiLaurentiis makes biscotti as a free-form loaf for their first baking. Her recipe looked pretty good.