I'm really, really impressed. This is one of the best implementations I have seen of "visual-based" online shopping. My biggest questions are:
1) How seamless will the purchasing experience be? Can you purchase the entire outfit from the website, or do I have to go to each individual retailer's website to make the purchase? This could make or break the website, and I would highly encourage you to find a way to be able to allow customers to purchase outfits directly on your website and have the orders forwarded to the retailers.
2) How customizable will the website be. I almost had a heart attack (metaphorically, of course) when I saw how expensive the shoes were in your demo video. I would suggest that you have options to put a price cap on the outfit and to launch with many different customization options (such as choosing outfit type by occasion, only showing clothes available in your size, etc.)
-I really liked how it said "Don't worry, I'm only 40 seconds long" on the video.