I've got a 256MB flash player at the moment, supposedly with a battery life of 8 hours. But with the highest rated rechargeable AAAs I can find, I'm still only getting 5 hours or so. Are there any good MP3 players out there that get really good battery life from an AA or AAA battery (it's a pity none of the iPod style devices use AAs)? So far I've seen the new circular sony MP3 player which can apparently get 70 hours plus from an AAA, although I'm kind of looking for one that I can plug straight into a USB slot to carry data without carrying an extra lead around. Does anyone here have any advice?