In case you are interested in an oddly-shaped speaker check out the Bomb Speaker made by Ifrogz.
As you can imagine it won’t provide high quality sound, but it will certainly provide a cool look to your living room. Anyhow, the Bomb speaker can be powered via USB or by 3 AAA batteries, and can be connected to most portable media players thanks to the 3.5mm input jack. In addition to the USB port to recharge the device, there is an extra slot so you can connect flash drives or portable hard-drives. The Ifrogz Bomb Speaker costs $40.
Ifrogz Bomb Speaker