Once again, it's one step forward, one step back for Ozaki, which only seemed to be stepping away from its most ridiculous overpackaging practices in favor of something different for its iPod nano accessory iCoat Watch ($25). Mimicking Griffin's Slap Case in the basics of execution -- there's a flexible metal bar underneath a colorful silicone rubber watchband for the sixth-generation nano -- iCoat Watch does away with providing an actual iPod nano…