No problem. I suppose you want some real feedback too. From what I can tell about YC backed sites, they are usually very, very, very clean. What I mean is: your homepage is too busy. Going along with my original comment, you should drive your tagline home.

Chop out everything that isn't necessary. In fact, the only thing you probably need to have is exactly what it means to sell and what it means to buy information using your site.

Make it as clear and simple as you possibly can.

From the way your design looks now, it seems that you're trying to have all your bases covered. It's a good impulse but you can do that in better ways.

But anyway, good luck on your application.