Ultra-Portable Speaker System for iPod and iPhone for $39.99 shipped.  It is available in Black and White.  You will also receive $5 of MP3 Download Credit at Amazon.  Here is a screenshot for your reference.  It is compatible with iPod classic 1G, 2G, 3G, 4G, 5G, 5.5G, 6G; iPod touch 1G, 2G, 3G; iPhone 1G, 3G, 3Gs.  The internal rechargeable battery plays up to 16 hours of music on a single charge.  At the time of this post, 53 out of 60 user reviews have given it 4/5 and 5/5 ratings.  Most places have it for about $79.