I've been developing an e-commerce store with nopcommerce for some time now, and it's starting to get some traction.
I worked with the 3.60 version, and built from there a full multi vendor store for independent vendors (similar to what you get on amazon, etsy, etc.).
The store is hosted on azure, and uses blob storage for image storing and azure search for indexing and search.
I've been doing my best to make the site faster and faster, and it has been a long and difficult ride, but I've been loving it.I must say nopcommerce is a great platform, and has saved me years of work!
If you want to take a look and consider showcasing it, here is the link:http://cuscute.com
Most content is in Portuguese, though, I'm from Portugal and we have less competition here. But I'm preparing to expand to America and UK, and then the rest of Europe.