What: Built a social network for shoppers; Who: A solo founder outside US; Rant: I think I've done a job at least on par with another YC11 company http://jerryji.posterous.com/on-yc-demo-day-40956
On your site, the main call to action is to post something I've bought. Why would I want to do that? I also couldn't actually figure out how to search for an item (I entered "Macbook Pro" into the filter but didn't find what I was looking for.)