Seems that iLounge ( http://www.ilounge.com/index.php/news/comments/griffin-debuts-italkpro-stereo-microphone-for-5g-ipods/ )
has an inside scoop on Griffin Tech comming with an microphone adaptor for the new 5G iPods.

Records 44KHz/16 bit waw files and has an external mic minijack-connector.

Could be a possibility for location sound of the non serious kind.