iWoofer for your iPod provides big bass in a cute package

The iWoofer speakers for iPod
Unique dock + speaker system for your iPod.

Combining what looks like a cross between a robot and a bug, the iWoofer is a compact speaker system for use with the iPod. It features a down-firing subwoofer for full bass in addition to titanium tweeters. The design of the iWoofer elevates the iPod screen so that it’s easier to read.

It is available in several models:
The iWoofer (black, white) for video, mini and shuffle iPods.
The iWoofer Nano (black, white) for nano and shuffle iPods.

The manufacturer also has more details.