A boombox your laptop is not, and speakers that are both portable and powerful are hard to come by. Depending on your needs, Logitech's Z305, a 360-degree sound bar, and Z515, a 50-inch wireless speaker, might do the trick.
The tubular $US99.99 Z305 powers by USB and clings to the top of your laptop, while the $US60 Z515 includes a USB dongle and a single speaker that can play for 10 hours over 2.4GHz wireless up to 15m away from the laptop mothership.
Both speakers will be available later this month, so start legally downloading music right now! [Logitech]