....to my knowledge, learning a language takes more than sitting like a fat burger watching tv and reading a bit of the target language once in a while....I know that mp3 players are great tools, but as it's been said already, yes, i agree, it's bull
nonetheless, it reminds me, that, if you'd listen to a tape while sleeping, well, right by the moment that your leg goes shivering for no reasons, and this corresponds to the moment where you are not awaken, but not totally asleep either, then at that precise moment, your brain is recording anything that goes thru it.
interesting thought though...