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I found this little guy for 13 bucks online
And I already had a bluetooth dongle laying around, but here is one for $25 bucks
With these two you can make any audio device wireless. Even your 7 year old iPod to you're home stereo or even car. Even if you don't get the 2nd device, any device that transmits A2DP (iphone 3.0, many many phones) then you can user your favorite pair of headphones as wireless headphones.