The transfer rates available now don't allow wireless headphones or earphones with adequate quality. Live with the wire if you want good sound. If you want to pay for an in ear monitor..well check this out http://www.etymotic.com/ephp/er88.aspx Will run you A LOT of money, but it's what you want
I don't know how well these work but... http://store.apple.com/1-800-MY-APP.../RSLID?mco=1BA897EE&fnode=home&nplm=MA817LL/A