This deal has ended.
Shop4Tech.com has the iKlear iPod and Mac Cleaning Kit on sale for only $19.32 after 12% off coupon code CC12 (expires 6/30). It's anti-static, alcohol and ammonia-free, and is specifically designed for Apple products. Plus, shipping is free and there is no sales tax (except CA). It's at Amazon for $16.38, but you need to spend $25 to qualify for free shipping.