Well, well, look at what we have here - now these won't make you look geekyat all, will they? I don't think I need explain what, exactly, these are: the picture really speaks for itself, but just in case you need a clue - they're a pair of headphones which you can attach your iPod to. Handy? Well, yes, I suppose they are, if you like to carry your Nano hands-free. Stylish? Well, I'll leave that one for you to decide.
One thing I'd advise, though, would be to wear these with caution: iPod muggings are on the increase, kids, so wearing one strapped to your head might be a bit like holding out your wallet and shouting "chase me!"