AS you have surely noticed, all- American preppy style has come back for another goround. There is madras everything, button-downs everywhere. Nantucket reds -- washed-out pink pants -- are the new khakis; Sperry Top-Siders are more common on roof decks than top decks; and the Polo pony and the Lacoste crocodile are now but two of the critters in a zoo of polo shirt insignia. Lately the trend has taken on a new dimension, via the Internet, with a resurgence of interest in once obscure Americ...
