It's touted as a disco enhancement, but it looks a lot more like raver chic to us. Whatever it is, Hammacher Schlemmer's "Dancing Light MP3 Synchronizer" will funkify your party with 33 multicolored LEDs bouncing off a concave mirror to the beat of whatever tunes you choose. It can even be set to four programs, "Andante, Moderato, Allegro and Presto." But if we were going to take this route, we'd just as soon go for the full retro effect with a home laser show. And remember, don't bogart that Nano.