The website's concept is pretty simple - get a glimpse of the home screens of popular Apple or online notables such as Joe Hewitt, John Gruber, or Jason Snell. The creator hopes that the website will help you "see something you've never heard of" and discover some apps that are so good that they made it on the phones of top developers, writers, engineers, and bloggers in the Apple world. The reason behind just featuring the home screen is also simple. While many people may have the same applications, the question is "how many love it enough to have it on their home screen, one of their first twenty apps."
In my experience, the website has opened me up to a few new applications and even some new ways to organize them. Leave a comment if you find someone's home screen to be of particular interest to you.