Flickr? Craigslist?

To create something game changing you have to be like apple, you just build interesting stuff and test it on users until you find something that works and then you release it to everyone.

How will we know if it works if you don't listen to the users? Quantitative information always benefits from qualitative feedback. It's really not enough to know what's successful if we can't tell how or why it's successful.

Also, the advice from almost anybody creating new and interesting products is to place yourself in the shoes of the user and build things that you yourself would find useful. Who should we be listening to then?