I know this is a cheap shot in a way but this post at 37 signals / signal to noise demonstrates really well how useful consumer feedback can sometimes be.
These are all consumer comments on the MacRumours forum following the original announcement of the ipod - so these are from hardcore fans, exactly the people we're always told to pay close attention to.
"I still can’t believe this! All this hype for something so ridiculous! Who cares about an MP3 player? I want something new! I want them to think differently! Why oh why would they do this?! It’s so wrong! It’s so stupid!"
"gee! an mp3 player with a HD! how original! kinda reminds me of a JUKEBOX i once knew.
I’d call it the Cube 2.0 as it wont sell, and be killed off in a short time…and it’s not really functional."
"All that hype for an MP3 player? Break-thru digital device? The Reality Distiortion Field is starting to warp Steve’s mind if he thinks for one second that this thing is gonna take off."
"There are already two products similar to this on the market. The Nomad Jukebox and the Archos Jukebox which can come with a 20 gig HD. The iPod is obviously a lot cooler and has firewire, but it is far from revolutionary. I for one am disappointed and think that apple is making a mistake by trying to get into this market."
Good job Apple paid attention and abandoned that whole ipod thing.