Polyvore impressed when they launched a while back because they have a very simple, clean and functional interface. Actually their functions weren't and still

Polyvore impressed when they launched a while back because they have a very simple, clean and functional interface. Actually their functions weren't and still aren't as advanced as other online scrapbook / graphic sites, but their UI has let them grow to be very popular... I guess a good lesson for rest of us newbies out there building consumer web apps.